The STW Astronomy a...
 

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The STW Astronomy and Astrophotography Thread

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As there are sporadic posts about astronomy, particularly what starter telescopes to buy etc and to save me starting a new thread every time I do an image and so hopefully other people share their images, I thought I would kick this thread off.

If no one wants to join in that's fine. I'll just share my images and put some pieces up about what I use, what the process is, imaging workflows etc 🙂 . Of course if anyone does have any questions or wants advice on anything astro related then just ask away.

I'll kick things off with my two best images to date; the core of M31 - Andromeda Galaxy and M13 - The Great Herculean Cluster. I will follow up with something on the kit I use, how it all hangs together etc soon also.


 
Posted : 19/12/2021 3:42 pm
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Cool. I saw the TV series Cosmos when it was first on TV many years ago and have been interested in Space & Astronomy ever since, although I rarely fully understand what's being explained!

Good work 🙂


 
Posted : 19/12/2021 6:10 pm
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Top idea for a thread - I'm always fascinated when you start a new one, so it will be great to have one place to come and be awed!


 
Posted : 19/12/2021 6:24 pm
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Great image of Andromeda - be interesting to see what it looks like though the dust clouds when the James Webb telescope gets going.

Interested to see how you do the imaging and processing.


 
Posted : 19/12/2021 6:28 pm
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Got a few projects in mind. One is a mosaic of Andromeda as due to the focal length of my scope the image above is all that will fit in to the field of view. Luckily the software and computer control stuff will automate the whole process. The biggest issue is simply imaging time. Say 1 1/2 hours per panel and I would need 6-8 panels that is 12 hours or so of imaging time in total.

However the nice thing about things like galaxies is they tend to hang around for a bit (a few billion years or so) so you can even spread the imaging time out over year.


 
Posted : 19/12/2021 6:39 pm
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Got into astronomy many, many years ago watching the moon landings and being inspired by Patrick Moore on The Sky at Night. Over the following decades it got pushed to the side by other stuff but never fully went away. However since retiring a few years ago I've realised it's one of the things I have a real passion for.

I've still not bought a telescope (the internet has sufficed until now) but planning to invest in one in 2022. Almost certainly one that lets me try astrophotography too.

So yes, I'll be a regular follower of this thread.


 
Posted : 19/12/2021 7:14 pm
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I've always had a passing intrest and wonder.

Since downloading the stellararium I've been able to develop a bit of knowledge. I managed to photograph the Andromeda galaxy the other night but the results were pretty poor. I had just got a canon r6 and was playing around with crazy high ISOs. I was shooting at 300mm with a 1.4 teleconverter at f5.6.
I'd love a scope, mount etc but probably wouldn't get the use just now.


 
Posted : 19/12/2021 8:21 pm
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@jamiemcf - you would not have to spend a lot (relative to a full imaging rig). on a tracking mount to get some excellent results from the R6. £350-450 ish for something that would easily handle the camera and be able to track sufficiently accurately for 60-120 second exposures.

The basic technique is to take several long exposure sub-frames (subs) and then stack and stretch them using specialist software (there are some excellent free packages) to get the detail.


 
Posted : 19/12/2021 8:30 pm
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Anybody local to me want a starter telescope?  free / cheap as chips to a good home - its just cluttering up my flat.  5" reflector  PM me


 
Posted : 19/12/2021 8:57 pm
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Awesome photos to kick off the thread! Hope to be a regular contributor, but struggle to get out with the scope as often as I'd like.

This is a recent-ish attempt at Saturn, using my phone held by hand to the eye-piece of the telescope... Under the circumstances I'm pretty pleased 😊

[url= https://i.ibb.co/4V9Cxs4/IMG-20210526-235654.jp g" target="_blank">https://i.ibb.co/4V9Cxs4/IMG-20210526-235654.jp g"/> [/img][/url]

I've got an old Nikon D80 gathering dust and I've bought a telescope mount for it, so hopefully the quality will improve.


 
Posted : 20/12/2021 8:35 am
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Great photos, OP. I bought an Orion guided scope a couple of years ago and use it intermittently (unfortunately, we have quite a few trees around us which limits the areas of sky I can see). It is fascinating to find and track objects like M13. (I have to say the synscan software is good at tracking but a bit hit and miss for alignment).

On a plus note, I didn't realize that Venus shows as phases, like the moon, until I peered at it on Saturday Eve and saw it as a crescent!


 
Posted : 20/12/2021 8:44 am
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@WillH - nice. Getting the planets with just holding a phone up to the eyepiece is hard. I know, I have tried and failed!

@Twodogs - do you do the full alignment process? I find with SynScan when you are doing the star alignment it often starts out quite a long way off however once you have centred the alignment stars and confirmed it is usually pretty good from then on in. Similarly I can only see the Eastern sky and even then houses and trees block the lower portion of it. Need to get out to my RC club's field where the skies are much darker and I have a 360 view.

For astrophotography work I use a method called plate solving which is deadly accurate but will post more on that later.

This is my imaging rig. I have since added an autofocus unit to it as well but have not had much chance to use that yet and I am now mainly using a Raspberry Pi for the computer control. Once I have my scope back from the telescope shop I am hoping for some clear skies and can get a few images done.


 
Posted : 20/12/2021 10:24 am
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This is a recent-ish attempt at Saturn, using my phone held by hand to the eye-piece of the telescope… Under the circumstances I’m pretty pleased 😊

I used to have a 200mm dob, and whenever I showed anyone Saturn they would think it was absolutely awesome (using that word in actual, correct way!). It's such a beautiful object in the eyepiece.

I loved the fact that you could spot and identify the moons as well, like with Jupiter. (Some of them, anyway.) Watching a moon crossing in front of a planet suddenly makes flat-earth theories even more laughable.


 
Posted : 20/12/2021 12:41 pm
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Agree - first time I saw Saturn I was totally blown away. And the weather bands on Jupiter. Yet to see the GRS but it is on the list of things to try and achieve sooner rather than later.

I also find the moon fascinating - get a really good scope and pump some magnification in and it feels like you're flying across the surface. The Lunar 100 is a great challenge also and it encourages observations throughout the various phases.

Many targets can be ticked off just with a pair of binoculars also.

https://skyandtelescope.org/observing/the-lunar-100/


 
Posted : 20/12/2021 12:46 pm
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@Twodogs – do you do the full alignment process? I find with SynScan when you are doing the star alignment it often starts out quite a long way off however once you have centred the alignment stars and confirmed it is usually pretty good from then on in.

I try to but for some reason it doesn't always allow me to complete it, and it's different between the handset and the software on my phone. For example, on Saturday, the software let me choose Capella and Jupiter as my two "stars". I got Capella centred and the software swung the scope vaguely towards Jupiter, but stuck without giving me the option to fine tune the final position (and it was a long way off)...just a cancel button showing!
On the handset, I wasn't even offered Jupiter as my second object. I don't know if I've accidentally changed something on the handset to limit what is offered


 
Posted : 20/12/2021 12:52 pm
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Incidently the version of the android app that was around when I first got the scope was way better, but stopped working when a new android version came out...the version they eventually released has been far worse (need to check for updates....)


 
Posted : 20/12/2021 12:56 pm
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Which mount do you have?


 
Posted : 20/12/2021 1:03 pm
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Yet to see the GRS but it is on the list of things to try and achieve sooner rather than later.

I was flicking through my astro notebook a few day ago, coincidentally, and noticed my sketches of the bands on Jupiter, the GRS, Saturn's Cassini division etc. I got rid of the 'scope about 8 or 9 years ago because it took up so much space - I need to find a more compact alternative but with the same amount of light gathering. 😀


 
Posted : 20/12/2021 1:06 pm
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Which mount do you have

Orion motorised alt-az


 
Posted : 20/12/2021 2:23 pm
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The weather is rubbish and my scope is still at the shop having its optics measured and tested so decided to give my mount its first service.

Going pretty well for a first go and actually the most of the grease is in better condition than I thought it would be but still a good job to get out of the way.

Particularly for astrophotography a smooth running mount is key. Even judders and snags that would be almost imperceptible to touch can ruin an image.


 
Posted : 21/12/2021 9:23 pm
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@Twodogs - I'll get the obvious bits out of the way first. Do you always have the North leg of the tripod pointing reasonably close to North and do you use a crosshair eyepiece to centre the first star?

Also do you ensure the time and date are correct in the handset?


 
Posted : 22/12/2021 9:54 am
 pk13
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I've been looking at getting a scope for smart phone photos ( with adapter)just the moon and maybe Saturn would the scope below be any good for a novice.
Celestron nex star xlt 4se telescope
There is on local for 250

Thanks


 
Posted : 22/12/2021 9:56 am
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@pk13 - nice little scope and you will get excellent planetary and lunar views with it. Things like the Orion Nebula (M42) and star clusters will be visible too and Andromeda galaxy (M31) will show as a grey smudge also. But what smudge - an actual other galaxy 🙂

And yes, a smartphone adapter will allow for planetary photos and you can get some really very good lunar photos that way. For deep space it is not so good as the mount is an Alt AZ one and not an EQ one so it cannot follow the rotation of objects in the sky over time.

But, for the money and to get you into it, it is a solid buy.


 
Posted : 22/12/2021 10:06 am
 pk13
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Thank you I've put it on my Santa list 😊


 
Posted : 22/12/2021 10:31 am
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I’ll get the obvious bits out of the way first. Do you always have the North leg of the tripod pointing reasonably close to North and do you use a crosshair eyepiece to centre the first star?

Time and date are correct, yes to the crosshair eyepiece (and also refocus the main scope to get the star centred....)

However, when I think about it...I may well not have lined up the scope to true North last time (Or I did, then I moved it). The instructions for the Synscan seemed a bit vague tho, as it could be read that this is only important either for a EQ mount OR for just pointing an altaz mount at an object and tracking, without doing an alignment. I'm almost certainly misreading them tho!


 
Posted : 22/12/2021 1:23 pm
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Any thoughts on a good app for a tablet for viewing the skies at night (with the naked eye)? Not looking for any bells or whistles, just something clear and easy to use. Happy to pay a bit, especially if it means being ad free.

From what research I've done Star Walk 2 seems to fit my needs, but curious as to what others think/use?


 
Posted : 22/12/2021 2:26 pm
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I use Mobile Observatory Pro (MO Pro)


 
Posted : 22/12/2021 2:40 pm
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@kennyp - Stellarium is excellent. The paid for version on Android and iOS is worth the asking price and the PC version is free and even better. Great for planning observation sessions.

@Twodogs - not come across that, will check it out. As to the mount; an EQ mount needs to be aligned to Polaris and it can be fiddly. This means the actual mount head needs to be adjusted correctly and not just the tripod. For visual obs it is not critical but for AP it has to be as right as you can get it.

An Alt AZ mount only needs to be pointing approximately North. It needs to do this as it needs a reference point to align from but it does not have to be 100% bang on. And remember the date is in US format - has tripped me up more than once!


 
Posted : 22/12/2021 7:32 pm
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Thanks Danny...I need to have a proper session next time it's clear. I usually seem to be nipping out for a quick look at Saturn or whatever, so need to take a bit more time


 
Posted : 22/12/2021 7:36 pm
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I feel your pain. The number of decent nights I've lost to stuff just not quite working is unreal.

I'm spending these cloudy nights doing dry runs of anything I can do try and iron out any issues so I can be as confident as possible it'll all work next decent night we get.

Alignment can be a pain. Astrophotography where you're trying to get multiple bits of kit to all talk to each other is another level altogether!

Trouble is, the bits that tend to go wrong; alignment, plate solving, guiding and focusing as a rule are very difficult to practise without it actually being dark and cloud free!


 
Posted : 22/12/2021 7:46 pm
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Cheers guys, I think Stellarium may well be the one. Ticks all the boxes.


 
Posted : 23/12/2021 2:42 pm
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Here is my baby on the Zygo testbench at Rother Valley Optics. Basically they fire a laser through the lens of the telescope to measure how good the optics are. The main number people look for is the Strehl number. The maximum theoretical value is 1 (or 100% - some manufacturers express it as a x.xx number and others as a xx.xx number, the latter being a percentage) but due to the way optics a value of 1 is impossible.

Anything above 0.95 is considered as optically perfect as a refractor needs to be. Mine is 0.984 which is very high indeed. But then it should be given the price and pedigree of the scope 🙂

RVO also cleaned and collimated the lens cell so I am good to go once the clouds clear...






 
Posted : 23/12/2021 3:45 pm
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Excellent thread. I own a not-bad Meade ETX90 Autostar, with the old-school mount. It does the job, but as the weather is often inclement, I usually break out my spotting scope for quick looks.

My family have been generally dismissive of this hobby since forever, until last Saturday night. It was very cold, dry and clear here in Central Scotland. I finally twigged that by setting up the scope on a tripod upstairs, they could stay warm and dry and view the object I'd aligned.

"Whats that?" I asked. "Its a crescent, so it must be the Moon?" they replied. Uh-uh, the Moon is over there (points away). That's Venus 🙂

It was apparently excellent and worth the delayed viewing of Strictly!


 
Posted : 23/12/2021 4:40 pm
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Well that's the mount dismantled, cleaned and re-greased. As per the above the scope is serviced and ready to go. At the moment I am just in the process of making sure my RPi4 is up to date with the control software and that it talks to everything first time and each time I hook it all up.

Now I just need a cloud free night or two to actually do some imaging. Got a few targets in mind so will have to see what I can get done...


 
Posted : 28/12/2021 3:50 pm
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This is something I’ve been interested in for years, but never really had time or disposable to properly indulge. I’ve been out with binoculars on occasion, and I’ve seen the Galilean moons of Jupiter, and just about picked out Saturn’s rings and a couple of it’s larger moons. I was reading an article earlier today about a photographer who managed to get the Neowise comet along with the Milky Way, and by a stroke of luck got a Strong Thermal Emission Velocity Enhancement, or STEVE, basically an aurora at the same time. Interesting article, he goes into a fair bit of detail about his research to get the comet, but it required travelling into the Canadian Rockies for the perfect shots!

https://mymodernmet.com/stanley-aryanto-neowise-milky-way-panorama/</span>


 
Posted : 28/12/2021 4:12 pm
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I bought a telescope for my daughter for Christmas a couple of years ago, but couldn’t see anything through it, before you ask, the lens cap was off, any suggestions? (At the risk of sounding like a numpty, We were using it indoors, is it imperative that they are used outdoors?)


 
Posted : 28/12/2021 4:17 pm
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@augustuswindsock - I assume you mean you were using it indoors but through a window?

A few things spring to mind but more information is needed; what is the make and model of the scope and did you use a smaller finder scope to make sure you were pointing at something?


 
Posted : 28/12/2021 5:37 pm
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Yes, it was through a window, its a vivo 76700 telescope and it does have a finder scope.


 
Posted : 28/12/2021 5:47 pm
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Cool - right a few things to start off with; what were you trying to look at, did you align the finderscope with the main scope and do you happen to have any eyepieces other than the ones that came with it.

Looking at the spec it comes with an 8mm and 4mm eyepiece. The 8mm will be just about useable, they only included the 4mm to make daft claims about the magnification of the scope.


 
Posted : 28/12/2021 5:58 pm
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https://singletrackmag.com/user/dannybgoode/ it was a little while ago, but iirc we were trying to look at the moon to start off with, we did try the different lenses as I didn’t know which one to go with, form what you’re saying it sounds like the 8mm is the all rounder?


 
Posted : 28/12/2021 6:36 pm
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Just read this article, which may be of some interest!

https://www.diyphotography.net/photographer-shoots-breathtaking-image-of-comet-leonard-from-his-backyard/


 
Posted : 30/12/2021 8:12 pm
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@augustuswindsock - I haven't forgotten you. I will respond properly tomorrow.

Wasn't going to do anything tonight - forecast too much cloud but then I get cross with myself when on a nice cloud free night I am not prepared at all and things don't go right. So tonight I set up anyway and tested out some new software, ironed out the bugs and even managed to make a start on gathering data for the Horsehead Nebula.

This is just a single 5 mintue exposure sub frame using a hydrogen alpha narrow band filter. I shoot in mono so I need to take a number of sub frames using various filters to get a colour version. Still , quite a lot of detail already showing but I need a good 1-2 hours worth of nice clean data for each filter so 4-8 hours in total.

The first version is how it looks straight out of the camera and the second, once it has been stretched (I use a piece of software called PixInsight however you can use Photoshop or Affinity Photo for stretching also).


 
Posted : 01/01/2022 10:27 pm
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There's a nice piece on the BBC website about a chap that took up astrophotography during lockdown (he seems to have taken some splendid images) -Whittlesey astrophotography provides lockdown escape - BBC News


 
Posted : 02/01/2022 9:46 am
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@augustuswindsock - again, apologies for the delay in responding. I think on that scope, particularly to get going with, even the 8mm is ambitious. You need something that gives nice wide low powered views to get everything set up. You also need to ensure the finder scope is aligned to the telescope otherwise you could be pointing well wide of the intended target.

If you want to try and get it working then I would suggest buying the 25mm version of this eyepiece. It will run you to £16 + p&p and is certainly good enough for what you need.

https://www.rothervalleyoptics.co.uk/skywatcher-super-ma-eyepieces-125.html

Then, during the day try and find a distant house with a TV aerial or a church spire or something and bring the scope to focus. Once you have done this look through the finder scope - can you see the object you have the main scope pointing at? If not you need to adjust the finder scope until you can.

Then at night wait until the moon is up and give the 25mm a go on that - should give yo some nice views. Once you've got all of that nailed down then you can try the 8mm but I suspect a few more longer focal length eyepieces would be more useful - a 20mm, 16mm and 12mm say.

Note to work out the magnification you divide the focal length of your scope (in your case 70mm) by the focal length of the eyepiece. So a 10mm eyepiece will give you 70x magnification. People get sucked into wanting really high magnifications when actually most often, less is more 🙂

Any questions let me know.


 
Posted : 02/01/2022 12:01 pm
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Edit: well that didn't work, working on it 😉
Edit 2: nope, 15 mins wasn't enough to fix that, oh well, I'll try and post in a bit *rolls eyes*

Ooooh! Me me! Pick me! Here's a few of my favourites from the last couple of years since I got into AP. IG handle is @dobberastro if interested 😉

Heart Nebula

Bubble Nebula

Andromeda galaxy


 
Posted : 02/01/2022 12:28 pm
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@munkster - as soon as I can get Insta working I will take a look :). I have been trying to get some decent imaging done since around 2019 however I have really struggled to get everything properly working.

I have had the odd success but not nearly enough to justify the stupid amounts of money I have invested in gear. Hence this year I am really making a push 🙂


 
Posted : 02/01/2022 12:35 pm
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@dannybgoode sounds familiar. I think I'm at a pretty stable point now, will read the rest of the thread when I get a chance. Planning to try some planetary imaging this year, so that'll be a whole other world of pain I'm sure!


 
Posted : 02/01/2022 12:52 pm
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Thanks for the tips Danny, really appreciate it, I’ll give it a go with a 25mm.
Just one thing, and at the risk of sounding like a complete numpty, is it imperative that we have to be outside?


 
Posted : 02/01/2022 1:07 pm
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Try again...

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[URL= https://astrob.in/ktd31z/0/rawthumb/gallery/get.jp g" target="_blank">https://astrob.in/ktd31z/0/rawthumb/gallery/get.jp g"/> ?insecure[/IMG][/URL]

[URL= https://astrob.in/v1f9rn/0/rawthumb/gallery/get.jp g" target="_blank">https://astrob.in/v1f9rn/0/rawthumb/gallery/get.jp g"/> ?insecure[/IMG][/URL]

Jeez, that was an effort! I'm sure I've posted images from my webspace on here many times over the c.20 years I've been on STW 😀


 
Posted : 02/01/2022 1:13 pm
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@munkster cracking photo.


 
Posted : 02/01/2022 1:18 pm
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@munkster - yeah they're really nice. What kit do you use? I have just ordered a mini PC to run NINA on. I have been using Astroberry/KStars which is fundamentally very nice however it just feels a bit flakey and does not work 100% of the time. It may just be me needing to spend more time fine tuning but NINA last night, once I had got over a few one time setup hurdles, was pretty much flawless.

I also jumped in at the deep end with a full mono CCD, filter wheel etc and for eg the filter wheel needed a new USB socket as it was intermittent but just tracking down the issue took time. But now I do feel there are photons at the end of the tunnel and I can make a start on some decent stuff I hope.

@augustuswindsock - no, no need to be outside but it generally helps when setting up as you have more freedom to swing the scope around and try a few different targets.


 
Posted : 02/01/2022 1:58 pm
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@dannybgoode - current set up is a Skywatcher 200PDS reflector on NEQ6 Pro mount and either a ASI533MC-Pro or ASI183MM-Pro if I want to do mono narrowband. I use NINA these days now I've cracked the autofocusing, and Pixinsight for processing but that's a very long road!!

I use a mini PC attached to the leg of the tripod for acquisition, and have resisted ASIAir simply because I don't like the proprietary nature of that, and am pretty comfortable with the individual apps (PHD2, Polemaster etc).

I do say "current set up" since clearly I've been through three telescopes (and three or four cameras!) in two years trying to work out what I really want. I also have a Samyang 135mm f2 lens which is nice for widefield stuff (see below)...

[URL= https://astrob.in/i2x157/0/rawthumb/gallery/get.jp g" target="_blank">https://astrob.in/i2x157/0/rawthumb/gallery/get.jp g"/> ?insecure[/IMG][/URL]

[URL= https://astrob.in/pi6r59/0/rawthumb/gallery/get.jp g" target="_blank">https://astrob.in/pi6r59/0/rawthumb/gallery/get.jp g"/> ?insecure[/IMG][/URL]


 
Posted : 02/01/2022 2:07 pm
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@Munkster - nice. Yeah I use PixInsight, really like it a lot although some of the new AP tools in Affinity Photo look very interesting and somewhat more accessible 🙂

As well as the TMB I've posted pics of on the previous page I use a Starlight Xpress SX674 mono and SX filter wheel and an Altair Astro guide scope and cam.

I too have finally got my autofocuser to work reliably - a Pegasus Astro FocusCube v2. I also highly recommend the Pegasus Astro Pocket PowerBox Advance too. Not cheap but makes cabling etc trivial.

Yep, I won't go near the ASIAir. Much prefer being in control of such things 🙂


 
Posted : 02/01/2022 2:52 pm
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Sounds like some nice kit there, I'm definitely invested in the ZWO world so sticking with that aside from ASIAir... Yeah I've got a PPBA after starting out with a PPB. The Advance is great as is anything that means "one less box" on the rig!

Are you on any of the FB astro groups? There's only one or two I bother with these days.


 
Posted : 02/01/2022 3:03 pm
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UKAI, UK Astrophotography and Astrophotography. Also on SGL of course :). I am lucky that Rother Valley Optics is just up the road from me so have easy access to expensive kit 😀

I am tempted by one of their own ED60 or ED72 scopes for something more widefield, or I may invest in another camera with a larger sensor. I try and stay loyal to Starlight Xpress - yes their kit is very expensive however their service is just brilliant. Truly exceptional really. They have an SX814 in their clearance section which is very very tempting!


 
Posted : 02/01/2022 3:11 pm
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Gents, my youngest (13), seems to have an interest in astronomy. She’s been reading about it for the last year and Santa brought her a celestron travel scope 70. Obviously just a beginner scope, however the reviews I’ve read aren’t promising.
Is it worth keeping that scope or maybe going for something better? Maybe something like the Sky-Watcher Heritage-130P FlexTube Parabolic Dobsonian Telescope?
Ease of you/setup and compact size is important. We live in a busy town with light pollution, so will be driving out to use.
I don’t want her enthusiasm to wane based on having a poor scope that is difficult to use.


 
Posted : 02/01/2022 3:49 pm
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@w00dster - the 130P is a fine fine scope and will, from darkish skies, show an awful lot. The number one thing to consider though is that a dob is a manual push to system and it can be hard at first to locate an object and then keep it in view. It is very manageable as well - easy to transport and easy for a kid to use.

£ for £ dobs are by far the best value route into astronomy. That said, the 70 is not truly hideous and it is at least worth trying out particular on the moon. It will still give some impressive sights.

If budget allows though I would perhaps suggest going for the 150P. Not a much bigger scope physically but the extra inch on the mirror makes a fair difference. I love my 150 - perfect all round scope.

I would also recommend a book called Turn Left at Orion ( https://www.amazon.co.uk/Turn-Left-Orion-Hundreds-Telescope/dp/1108457568/ref=sr_1_1?crid=2YMY9QGE1EIT2&keywords=turn+left+at+orion&qid=1641139043&sprefix=turn+left+a%2Caps%2C55&sr=8-1) - pretty much the go to book for learning the night sky.


 
Posted : 02/01/2022 4:00 pm
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So here we have the full 2 or so hours of hydrogen alpha data on the Horsehead Nebula. You can see just how much more detail and how much less noise there is when compared to the single 5 minute sub frame a few posts up.

Really pleased with how this is turning out. Tomorrow looks like it could be cloud free also so will hopefully get the red channel completed also.

When I get chance I will pop some details up of how to get started in astrophotography. You can do an awful lot for not a huge amount of money and of course if you get bored of sinking proper money into e-bikes and Audis then this is the hobby for you ::


 
Posted : 04/01/2022 10:58 pm
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I'm wanting to join in....

Now live in a dark sky Park.

After a good beginners scope. I'd like a motor control one as I think I'd find it easier and it gives me more options especially for pictures.

I'm going to go the local club if it's running but does anyone have any scope suggestions. Not adverse to spending a few hundred quid on a scope.


 
Posted : 04/01/2022 11:43 pm
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@duncancallum - not at all jealous of your location! The demands on the mount in particular and to some extent the telescope are much lower for visual astronomy than they are for astrophotography however that does not mean a half competent setup is out of reach for a sub £1k budget.

I would suggest something like this as an good all-round starter package. The mount will GoTo and track (although note setting these things up can be a lesson in frustration and it is not always a case that you will be whizzing round the sky finding objects) and it will also work in EQ mode - something of a prerequisite for longer exposure astrophotography.

The scope is very good - one of the best starter scopes going and you would be able to mount a dSLR to it to get going in astrophotography and you could also mount the camera with a normal lens on it also and take photos that way.

https://www.rothervalleyoptics.co.uk/skywatcher-explorer-130ps-az-gti-wifi-telescope.html


 
Posted : 05/01/2022 12:28 pm
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So here we have my image of IC 434 - Horsehead Nebula. My red data was pretty bad from last night - I tried taking it when it was still relatively low in the sky and the neighbour's security camera causes funny artefacts until the scope is pointing higher so I only got 4 usable subs.

So I used the Ha data for the red channel and then merged the R G B and Ha stacks to form a 'super luminance' stack. So in PI I merged Ha, G and B and got that right then brought in the super lum stack.

More tweaking in PI before some final work in Affinity Photo which now has some awesome AP routines built in...


 
Posted : 06/01/2022 3:07 pm
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Not my best image by any means but this is from some data I captured last March and to be honest I didn't think there was much there. However I decided to try processing it yesterday and there was enough of a result to do something with.

Focusing is a little off but I didn't have a mask or autofocus then and it is shot in narrowband and only 50 mins per channel and really I need at least double that but for old data that I didn't thing would scrub up I am happy enough.

IC 1795 - Fish Head Nebula


 
Posted : 09/01/2022 10:14 am
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With the moon getting fuller the sky is a little washed out for deep space imaging so I decided to give lunar imaging a go. Surprisingly tricky as you are focussed tight in and can see the atmosphere moving which means it is like viewing the moon from under water and makes getting good focus difficult.

You then basically film the moon for a few minutes and then use software to select the best frames from the footage and stack them as a single file. These two images are the best 20% from 3000 frames each.

Nearly all the craters have names. This is Plato

And this is Copernicus (the larger one) and Erasthenes


 
Posted : 13/01/2022 8:49 pm
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Nice photos, the Horsehead particularly.


 
Posted : 13/01/2022 9:08 pm
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Really enjoying this thread, always had a strong interest in the night sky and last year unexpectedly received a birthday Skywatcher 130m.

Also have a 50D to mount on it.

Very much still getting to grips with alignment, tracking and focus etc. Hope to move on from the moon and planets this year.

Thanks for the inspiration.


 
Posted : 14/01/2022 6:49 am
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@alchiltern - what mount do you have for the scope.

To help with focusing look at Bahtinov masks. You put them over the end of your scope and point at a star. It causes diffraction spikes and you alter focus until the two central spikes go right through the middle of the star. You are then in focus. Very simply, very clever and very accurate.

Just remember to take it off before you start imaging!

https://www.rothervalleyoptics.co.uk/bahtinov-masks.html

For lunar imaging try filming the moon instead of taking a single photo and then use Autostakkert (free) to stack the best frames using what is called lucky imaging.


 
Posted : 14/01/2022 8:30 am
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I was out looking at the moon the night before last...there is something fascinating about looking at it....especially the ridges and peaks going off the edge.


 
Posted : 14/01/2022 8:50 am
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especially the ridges and peaks going off the edge

I never get bored of looking at the moon and when it is too bright for proper imaging I often start the night off by having half an hour on it visually. The dark edge of the moon is the terminator and that is where the real detail can be seen and day after day it reveals a little bit more until full moon and then repeats as the moon wanes.

The Lunar 100 is well worth attempting if you have an interest in lunar obs

https://skyandtelescope.org/observing/the-lunar-100/


 
Posted : 14/01/2022 9:27 am
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@DBG

Many thanks for the info, will get hold of one as doing 'by eye' has been a touch challenging at times.

On the mounts, just the battery powered one it came with, looks identical to the one listed on the rother Valley site. It'll track in a simplistic fashion, only if the alignment is correct. Definitely still learning.

I'd love a fully motorised and programable one, but probably need to develop core abilities first.


 
Posted : 14/01/2022 9:48 am
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Nice little scope that. Some good deep space targets for something like that are M42, M13, M45, M31 etc - nice bright targets and take lots of short exposures and stack them using something like Deep Sky Stacker ( http://deepskystacker.free.fr/english/index.html)

The reason for short exposures is that the mount will not track sufficiently accurately for long periods and cannot (I don't think) be guided. I take exposures of up to 5 mins long and image a single object for hours but on a nice bright target you could take say 30s exposures and do that for a hour and have lots of frames to stack and end up with something reasonable. It takes a lot of time and practise to get confident though.

If you are local-ish to RVO I'd be happy to meet up and show you the basics of how to set up a cheap imaging computer etc.


 
Posted : 14/01/2022 11:16 am
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Thread Resurrection!!

I thought some of you might want to give this a follow. Lee "The Starsmith" used to frequent these parts and is a former MNPR regular (if there ever was such a thing) and is setting off on a journey around the UK's dark sky areas in search of the best Astrophotography images (and no doubt he'll be spending a gazillion pounds in the process).


 
Posted : 11/04/2023 7:33 pm
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Nice to see this thread brought back. I've been enjoying my astronomy this winter. Just naked eye stuff but have a significant birthday next year so will be pushing for a telescope as a present.


 
Posted : 12/04/2023 9:16 am
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<p>I’ve just read about this, a new supernova in the Pinwheel galaxy, that’s visible with a decent backyard telescope:</p><p> https://www.iflscience.com/a-supernova-just-exploded-so-close-a-backyard-telescope-can-see-it-69026 </p>


 
Posted : 23/05/2023 12:08 am
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Thread resurrection 2!  I know two things about telescopes, bugger all and nowt! So as retirement beckons ive found myself getting interested in the night skies and I’ve decided to treat my self to a telescope. Can someone recommend what to get, looking at £400ish and I ve seen that you can fit a smart phone I’m guessing to take photos, if so that would be good. Tia


 
Posted : 22/12/2024 12:49 pm
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Be prepared to spend more.


 
Posted : 22/12/2024 1:14 pm
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Sorry I should say more.   £400 wine m won't go far buying new.   Or could get some decent gear used.   Don't skimp on the tripod,  mount or eyepieces,  unfortunately most bundles skimp on all those.

As for type of scope etc,  it fronds depends what you want to look at and from where.

Where ever you start,  if you get tucked, be prepared to spend more!

I've just upgraded my refractor so have one to move on. It's within your budget,  and you'd have some to go toward eyepieces and a mount and tripod.   I won't push it but if you want to know what it is I can give some details.


 
Posted : 22/12/2024 1:37 pm
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Coggle I've sent you a reply and now get 'you've reached your limit for sending messages'  I've deleted several from my inbox but no change, so if you want more info it might be best to send me your email.  Then again perhaps this place will allow more tomorrow?


 
Posted : 22/12/2024 9:52 pm
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Blimey, quite the thread resurrection (again!) - not being one to brag (oh alright maybe I am) but I entered the International category of the Skywatcher Australia Astrophotographer of the Year competition. I bagged a bronze medal. Which was nice. (Except I didn't actually "win" anything, just the recognition). Clear skies everyone, which is a very big ask these days!!

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And here's my "best of 2024", pretty slim pickings this year, frankly...

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Posted : 23/12/2024 6:46 am
ampthill and ampthill reacted
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Stunning photos!  I take my hat off to any and all astrophotographers, I find visual observing tricky enough!


 
Posted : 23/12/2024 8:31 am
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TBF having failed fairly miserably at visual, once you've gone through the (guaranteed) heartache of getting an astrophotography setup singing to your tune, it's pretty easy to capture the photons, weather permitting. Where the next level comes from is getting anywhere close to feeling like you're "mastering" processing of whatever your camera has given you...


 
Posted : 23/12/2024 5:51 pm
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