How Long Should my Subs Be? | Astrophotography Tutorial

How long should your subs be? A simple question but answering it correctly takes you to the heart of astrophotography… which is why it takes me an hour to explain it in the longer version which I made for my lovely patrons😂This is the quick version for folks who want a quick answer. This is a NERDS ONLY video. If you are a normal person please don't watch it!

If you would like to watch the full length tutorial and join my PATRONS (£3) follow this link: https://www.patreon.com/posts/exclusive-video-65858815

For FREE ASTRO ADVICE from my lovely community join us on discord: https://astrobiscuit.com/discord/

The longer video tutorial for Patrons should give you a good understanding of how modern CMOS astro cameras work and that knowledge will help you choose the best camera to buy.

There are many cameras that I recommend on my website: https://astrobiscuit.com/best-gear-for-lucky-imaging/#camera

If you are a patron and you have any questions you can message me from your patreon account or in the #ask-a-mega-nerd channel in the biscuit tin – an area dedicated to my Patrons – on the astrobiscuit discord server ( direct link: https://discord.gg/Dcqh3RangG)
Please type your question with the prefix “@astrobiscuit” and I will get pinged. I aim to answer your question within the week, although I’m sure one of our meganerds will help you before then…

Full Length Video Contents:
00:00 Intro
00:51 Basic Level
04:21 Histogram explanation
05:00 What the histogram of your subs should look like
07:09 Advanced Level Intro
07:48 Shot Noise
08:57 Signal to Noise ratio
11:22 Sky Glow noise (light pollution)
14:30 Dark Current Noise
16:52 Read Noise
19:27 Working out your best iso/gain setting
20:32 Fixed Pattern Noise
24:37 Dithering explanation
26:02 How long should your exposures be?
28:29 running through situations where you can get away with shorter exposures and when you can’t.
31:40 working out your exposure length using your historgram
31:55 working out your exposure length using Dr Robin Glover’s website and formula
39:05 outro

Видео How Long Should my Subs Be? | Astrophotography Tutorial канала Astrobiscuit