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Astrophotography

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- Mon, 23 Mar 2020 19:03:30 EST zhzC7ZYp No.58017
File: 1585004610644.png -(2842084B / 2.71MB, 1366x1154) Thumbnail displayed, click image for full size. Astrophotography
How many of you do astrophotography? Anyone down to share photos and discuss setups? Any outsiders to the hobby interested and have questions? Git on in here.

Pic related, my most recent, and probably best shot of a galaxy- NGC2903. Taken on a Canon T6i through a 6" f/5 Newt on a Meade LX85 mount @ ISO 1600, 61x32sec exposures + 142 bias frames, 23 dark frames, 91 flat frames. Processed in DeepSkyStacker, PixInsight, and RawTherapee.
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Jan Hendrik Oort - Tue, 24 Mar 2020 12:03:52 EST HUBAqrsF No.58021 Reply
wow man that is amazing. how much did all your equipment cost you? i seriously doubt anyone here will have anything like that to offer lol
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Johann Bode - Fri, 27 Mar 2020 08:17:02 EST EZOyjhDZ No.58023 Reply
>>58017
Semi unrelated:
Can you track the ISS and perhaps capture a docking maneuver with your equipment?
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 11:31:36 EST zhzC7ZYp No.58024 Reply
>>58021
Oh man... Idek it's just snowballed over time. Probably at least 2k, including two Newtonian reflectors (both 6", one f/5, one f/8), the Meade GEM, an Omegon LX2 mechanical star-tracker, two DSLRs (Nikon D90, Canon T6i), adaptors/lenses/eyepieces filters, the 12v SLA power tank, intervalometers, scope mounts, finder scopes/sights, a folding chair, and a wagon to carry it all in.

One can get involved for way cheaper though, even a DSLR, shutter remote, and a fixed tripod can yield surprisingly good wide-field images with image-stacking. I started very budget and scrimped and saved for the expensive pieces (mainly the GEM and Canon T6i.) Dare say I won't have to upgrade for a looong while though once I eventually add an autoguider camera, laptop, and narrowband filters lol.
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 11:36:32 EST zhzC7ZYp No.58025 Reply
1585323392901.png -(12060827B / 11.50MB, 1496x1006) Thumbnail displayed, click image for full size.
>>58023
Yes! Surprisingly, the ISS is much easier to track on a manual mount. All my ISS shots were taken with the 6" f/8 on its original Dobsonian (cannon-style) mount, a well-aligned finder scope, and a remote shutter switch. You just lead the ISS in the finder scope, go hands off, rapid fire the shutter, and repeat as much as you can during the transit. Feels kinda like manning an AA battery, and if your ISO and exposure are set correctly, you should have a good handful of acceptable shots.

This is from a transit that only reached about 40º overhead, and far from the best I could get with my set up, but it gives you an idea.
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 11:41:01 EST zhzC7ZYp No.58026 Reply
1585323661901.png -(9640116B / 9.19MB, 1266x1266) Thumbnail displayed, click image for full size.
>>58023
This is from a transit almost directly overhead, but it was my first attempt and the exposure time was set too long, thus, the centipede ISS.

To answer your question about docking maneuvers, it is possible to capture CYGNUS and other vehicles rendezvous-ing, yes, though I haven't done so. People have even captured astronauts outside of the ISS during space-walks! https://www.wired.com/2009/12/a-spacewalk-as-seen-from-earth/
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 11:54:50 EST zhzC7ZYp No.58027 Reply
1585324490901.jpg -(9827532B / 9.37MB, 3466x2306) Thumbnail displayed, click image for full size.
and while Lunar AP is low-hanging-fruit compared to planetary and deep-sky, it can still be a lot of fun (pic related).

Reminds me of another important proviso: know what you want to shoot before getting gear. My equipment and post-processing workflow for planetary vs. deep-sky have little in common.
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Wilhelm Beer - Fri, 27 Mar 2020 14:51:07 EST i9bBRhbc No.58028 Reply
I really want to pick this up as a hobby when i have a bit more money.

I love star gazing and i live in a dark rural area without too much light pollution, I wish everyone would just go outside once in a while to just look at that fucking crazy shit.
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 15:38:12 EST zhzC7ZYp No.58029 Reply
>>58028
You already have a huge leg up! Light pollution makes one of the most crucial differences in how easy it is to take AP. I generally image in Bortle zone 8 (scale of 1-9), and down to a high Bortle 5 45 minutes out when I'm lucky. It's like squeezing blood from a rock... I'd have to drive over four hours to get to really dark skies (planning a camping trip this summer for that reason :) ) , but in places like that, you can get the same images I get near the city in a tiny fraction of the time (or far, far better ones for the same time investment)!

Not to mention, since your individual exposures/subframes would yield better signal : noise ratio, you could get by with much less precise tracking (and so more affordable gear, far less need for filters, etc).
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Joseph-Louis Lagrange - Fri, 27 Mar 2020 16:11:55 EST zhzC7ZYp No.58031 Reply
>>58028
And yeah, I feel you about people needing to check out the night sky more, but you have the benefit of those rural skies. I get why people don't look at it where I live. They don't have the optics or the patience, and who can blame their lack of immediate curiousity when to the naked it eye it's just a flat gray blanket with a handful of guttering pinpricks. They get consumed with what they can take, accumulate, illuminate, and guard on the ground, and the more paranoid and insular our mindsets get, the more we imagine the need for high-pressure sodium and mercury vapor lamps on every street corner. :( Light pollution is tragic and avoidable.
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Friedrich Bessel - Sat, 04 Apr 2020 17:47:02 EST 0faxo4BS No.58039 Reply
>>58029
Alright that's cool. I will try something out one of these days and post it here!

>>58031

I get it, I'm not really blaming people for it, it's just such a stupid problem, it's killing a lot of insects too.
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Annie Cannon - Wed, 08 Apr 2020 12:23:49 EST 0faxo4BS No.58040 Reply
>>58031
Good news is, i found a decent camera+lens

Bad news is i don't have a charger and getting a new one might take some time

balls
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Molniya - Wed, 13 May 2020 11:55:09 EST ZuMF7RSe No.58064 Reply
1589385309943.png -(533432B / 520.93KB, 336x264) Thumbnail displayed, click image for full size.
ISS with the japanese HTV-7 next to it. Took it ~2 years ago with a 60mm refractor and a phone

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