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How Much Gain and Sub Exposure is Enough?
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- Опубликовано: 6 авг 2024
- In this video I go over the main way to calculate a sub exposure when doing astrophotography. It's not super difficult, but does take a little research and experience. I also go over what I use for my sub exposure times and the gain I use on my camera.
First video from AstroFarsography on Robin Glover's lecture - • Deep Sky Astrophotogra...
Second video from Robin Glover on gain -
• Choosing the right gai...
Clear Outside page - clearoutside.com/
Sky background calculator - tools.sharpcap.co.uk/
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#astrophotography
All I could find was reviews of astro cams while what I wanted to understand was how to adjust shooting from DSLR to Astro cam. Then I found your video and the links you provide. Thank you.
Thanks Patrick!
Good information Joe, good work putting it together. 👍
Thanks so much Ollie!
Thanks! That's the clearest explanation of optimum exposure time I've seen. A great help!
Thanks so much for the kind words Dave! Glad it was helpful.
Great tutorial Joe! Robin's presentation was an eye-opener for me as well. Stay cool!!
Thanks dali! It’s been a while since I had seen it and thought it’d kind of go well with some beginners who may not have seen it. It’s crazy how much better the cameras have already gotten as well since then.
Thanks Joe,
THis is one (of many) areas where I NEED to learn and understand more.
Thanks Pat, seems like never ending learning in astro lol
very informative, and lays things out in a easy to understandable format.. hope you get some clear skies soon... it is just hot here now and all equipment is inside my air conditioned house.
Thanks Jason, you’ll have to make a road trip to Colorado so you can image.
Nice one Joe. Great explanation and will help a lot of new and budding astrophotographers.
Thanks Glenn, I really hope it helps new people!
Wow, technical stuff Joe! Well explained, here I was thinking astrophotography was easy🤣 Very useful and informative! Clear skies
Thanks Simon, much appreciated!
Thanks! A lot to mull over. Also, testing is good to determine shot length.
Great video! Really helpful 👍🏻👍🏻
Thanks so much Jon! Glad it was helpful
Very useful video and well explained. Trying to understand all those graphs and aspects of the camera sensor is very confusing when you first start out.
Thanks Logan, I hope it helps people just starting out.
Hey Joe. Hope all is well.
A well detailed and helpful video mate, good stuff. To be honest I have never payed much attention to alot of things in astrophotography until lately. I tend to just wing alot of things just to see what happens.....Mayby I should pull my finger out and do some learning, it might actually improve my images Haha!
Clear Skies buddy!
Thanks Ben! I think of astrophotography as part science part art and I like to delve into both parts equally.
Great video Joe! I've kinda settled on 10 min subs for narrowband myself. CS!
Thanks James! Technically, following the formula, I should be taking around 45min subs in narrowband, but that ain’t happening, so 10 minutes is where I’m at too.
Very helpful thanks!
Thanks Seafox!
Fantastic Video Joe, I needed This. Cause Ik still Learning to photograph Galaxies and Nebula. I use Sharpcap, and The Best Ea I found To Get a Low Noise Image Is Low gain and Long exposure, Otherwise I tend To Pick up a Lot of Sky Glow, I just Ordered the Optolong Moon and Sky Glow Filter, I will Try To Go for Longer Subs On faint Objects now!
Thanks Avanteesh! I'm so glad it was helpful as well! Interested to see what you come up with on the Optolong filter as well.
There are just so many aspects of this hobby that it is insane!! Very informative Joe. I never took that deep dive into being a mathematician but I get by knowing enough lol. Also, you think I can take my scope over to your place for a week? It's hot as hell over here now! 😩
Thanks Isaac, I'd be honored to have you come by and shoot some night sky with me brother!
Great video Joe although sometimes I think I've gone way over my head at times, I've never been into any sort of Photography until I started astro back in late 2011 & back then I just used a modified webcam taking pictures of the planets mainly, but slowly I progressed to deep sky by myself getting a Canon 1000D but that wasn't enough so I got myself a modified DSLR which had its issues but kinda worked. I never started any sort of guiding until 2014 but I never imaged from home due to my garden being lit up by an inconsiderate neighbour that I had at the time so always went to a dark site. It's only fairly recently I've been imaging more regularly but I still only image OSC as I can't afford to go mono. Hopefully I can improve more over time & eventually go mono but I think that's going to be a good while yet.
Thanks DDO, I watched your video on the Wizard Nebula and thought you had a really good capture!
Thanks Joe this time of year in the UK you don't get much time on any targets so with such limited data I'm pretty pleased with what I've been getting so far, the RASA has been a pain to begin with but I've slowly been taming the beast lol.
Another very interesting and helpful video Joe. - Thanks! For example I didn't know the sharpcap calculator until now. Concerning gain and finding the sweet spot between gain, low noise, FWD and DR: Do you try several values and test imaging before you do your actual imaging session(s) or do you really set it once (by experience) and that's it?
Thanks Tully, I sometimes take test shots on targets I’m not sure about. I find it better to spend a little while to dial something in then to waste a night or more on wrong exposures.
@@JoesAstrophoto Joe, thanks for you reply. Alright, this certainly makes sense. :) cs.
Great video! Thanks a lot!
Unfortunately both links to Robin Glovers videos point to the same video. Could you fix this?
Thanks Chris! Sorry for the mixup, I changed the link to hopefully the correct one this time.
Measure in SharpCap. It will give you minimum required exposure for your skies, filter, camera and scope. You can increase as much as you want as soon as you meet SharpCap minimal requirements. It will only slightly improve pictures, but save a lot of space on comp.
For example, in bortle 3 Ha exposure should be at least 30 min. In bortle 1 > 1 hours 🧐
Thanks Ana, it’s not practical for me to get 30min subs unfortunately, but I know what you’re saying and have used that feature before.
@@JoesAstrophoto Do you have bortle 3? If yes, it is terrific. My is 7. Everything is simple: LRGB 1 min (could be 15 sec!) and SHO bandwidth 3nm 4-5 min.
would have been helpful to have put the formula on screen or in the description..
Thanks, the formula is in the other video I recommended, but I do agree that it would've been helpful in my video as well. Thanks for the suggestion, much appreciated.
Joe, there is no Unity Gain on the ASI2600.
Thanks Simon, and absolutely correct. I should have said at the gain where the HCG kicks in. I’m used to saying unity gain as the older cmos cameras I’ve used in the past usually had unity at that point.
The size of that camera!!!! o_O what the hell is it????
Hey Mazz, it's just the 2600MM Pro. For some reason I think the outside diameter is the same as the 6200MM even though it's only an APS-c size sensor. Maybe for cooling?
@@JoesAstrophoto it's looks huge haha.
Man that is one big mount
Thanks Steve…I could possibly be over compensating for something? Naaaaah
@@JoesAstrophoto Hummm not going to touch that one
hey maybe you know where I can look. I have a color cam and used 2 different filters ... how would I combine the master images ?
APP has a ton of tools for that kind of thing. It’s not free, but does have a trial version so you can test it out.
@@JoesAstrophoto Hap APP in the past ,would like to know how to do in pix