How Long Should my Subs Be? | Astrophotography Tutorial
ฝัง
- เผยแพร่เมื่อ 13 ก.ค. 2024
- 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: / exclusive-video-65858815
For FREE ASTRO ADVICE from my lovely community join us on discord: 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: astrobiscuit.com/best-gear-fo...
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: / discord )
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 - บันเทิง
He came back when the world needed him the most
Pink Bunny!🎉
Elaborate
I know you might not think it, but this was actually SUPER useful. I'm going out with my telescope and dSLR tonight for the first time.
I really like straight-to-the-info tutorials. It gives people an informed starting point from which to experiment with. Great video.
As someone just getting started - This really helps.
The format is great too - Short videos for 'quick' tips like this - but the longer videos are valuable for us nerds too.
Thanks, Mr Biscuit
Read Robert Glover (creator of SharpCap). It has detailed explanation. This is amateurish presentation and not entirely correct one.
I like the idea of the odd shorter tutorial video like this one, very informative, great work honestly
That's actually good advice. The shape of the stars and the histogram tells it all and the preview at the end is promising that you will deliver all the details as to why that is.
It does not all the time. I have nikon d 810a and it has problems so you need to take a picture at least pass the middle of the histogram also you don't always see how alongated the stars from the screen from the camera.
This is such a good and simple tutorial. Thanks a lot for making it and keep it going!
This was purely an ad for his Patreon channel. Nice one! lol
The longer the better. All your videos are of the highest quality, informative and entertaining.
in ideal world with perfect seeing and sensor yes, but you must to use jittering trick and shorter exposure to counter sensor imperfectness and occasional clouds.
Decent advice here for “ordinary” photography, too! The penny has also dropped as to how Substack got its name :)
thx martin appreciate ut
ty so much AB. keep giving us this great content!
Yessss mate! Finally he's smashing out the tutorials!
Happy new year thank you for another year of great videos and more to come.
Great video Rory! You had me laughing the whole time. Very informative too!
Thank you. Happy new year!
The man is back 🙌 if you only knew how I miss your uploads
Very understandable, fun and entertaining. Great video!
Your the man Rory. Love your videos.
Congragulations on 300K subcribers.
2 new videos! It’s a miracle 🎉
Love this guy!!!!
I could listen to you all day.
I love this guy!
This is a great piece of info. Thanks! 👍
This is the best astrophotography tutorial I have seen, to date.
Great vid!!! Straight to the point.
Astrobiscuit please post more? I really enjoyed watching your videos and was really relaxing for me. Keep going!
Dead simple, dead straightforward, really great! Thanks for putting this together
i needed this.
Thanks for the tutorial!
Amazing as always.
Thanks Mr Biscuit ❤
I was just about to go out a shoot something and then saw this... was definitely worth the time
My neighbour is getting a scope for his daughter for Xmas, I immediately pointed him to your channel, this vid is gonna help them so much!
Thank you for this video. We can see your video after months. Thanks for early upload.
You are the best!
Cool video. Keep up the good work
Yayy he is back so sooon
Yep, it is THAT simple to start with #Astro #Photography - well put video.
👍
Very clear ! Thanks, i was on the right track.
Just was using ISO on 3200 on my Lumix G9
Thanks for the little tutorial
Hes back!
You are a MASTER! thank you very much!!!
Thanks Rory, great video. I mostly do planetary images, but i'm kinda interested in expending the hobby to deepsky. So this video helps a lot!
Want to learn more? Pay! I love Patrion. I can't do that because the guy who taught me didn't cover anything.
Thank you!
Woop! I thought I'd have a bit of a biscuit binge and what a suprise to have a new vid!
Straight to the point, loved it.
i do feel slightly ashamed that its just a bog standard video but it does what it says on the tin so hopefully few complaints
@@Astrobiscuit Don't be, I'm a relative newbie myself and its good to be reminded of the basics every now and then. Keeps us all honest lol
@Astrobiscuit I've signed up as a Patreon :) least I could do with the amount of sheer knowledge I have gained from your great channel!
@@DanFPG ahh thx bud. do let me know if you run into any problems
Thanks again!! As a mere mediocre landscape astrophotographer that was quite helpful!!
Been waiting for you to upload a new video
Thanks for your video, great as ever, with a dose of humor. I like it. Any chance to get your hands on the Dwarf 2 and review it?
he back :D
now that brought all the discussion to a pretty small conclusion.
You complete me Astrobiscuit!🥰
that made me laugh... clearly you must have been less than a whisker away from completion😂
@@Astrobiscuit Yes there was a whisker in it!
Lol! Nice! Well done
What good timing I started trying astrophotography last night! I do not have a tracking mount yet though! So attempting untracked for now
Be careful. You are about to enter a path with no return. (an expensive one)😉
@@pederp5749 so long as its fun! So far so good
Easy peasy!
Being a beginner, the Coles notes version of ISO and time really helps. I know nothing of photography, but I can nerd out later after having a few successes. cheers Biscuit and thx
About to head to St Lucia (B4) from London B9! This video is EXACTLY what I was looking for to determine the longest subs I should take. Thanks Rory
Nerds! FTW!!!! Awesome as ever, Rory the Breaker...
Thanks
Hello good day to you, from Glendale CA , love the content Im 100 percent sure your going to have a boom in subs any minute now! Just need to post more videos 😄. Im looking forward to seeing your trip in October. Okay so I have a Fuji Xm1 and I believe it only goes up to 30 seconds . If thats the case should i try to take mini videos instead?
Fantastic! Go to a forum and ask the same question about exposure time and gain and 300 people will answer with 300 different answers.
thanks rory. and you too biscuit. ;)
Finally a some straight, clear, criteria on how to understand if the exposure is good enough or not at first glance. Another could be: is trading saturated stars in the target for better faint details worth?
Thanks!
thx sorry for the late reply👍
Thx 👍
2 months, Oh how I wish you could do this full time
That rig looks a bit top heavy with that monster of a scope on that poor little EQM35. Love it!
I think you need to pick your battles when first starting out in astrophotography so I get why you say just set the camera to ISO 1600. There are more important things to concentrate on like focus! You're stuffed if you get that wrong no matter how good your processing skills are. Good info on the histogram, Keep up the biscuity crumbs of knowledge :)
Yes,yes,yes
Love from Bangladesh 🇧🇩 ❤️
Yay! It's not a short!
I’m seriously considering the patreon and i don’t even have a telescope 🤣. Only an old dslr nikon D90 and i don’t think it can do the trick.
Thanks for the video! I’ve just got a Celestron travel 80mm. Really struggling to kind my iPhone 13 camera up to it!
I'm from New York. My subs should be 8 inches if I'm a little hungry, or 12 inches if I'm really hungry. But I don't take pictures of my food. :)
I LASTED 5 minutes, you were right, cheers.
not related to this video per se', but the only scope in our house is a bird spotting scope with a minimum and maximum magnification of 20-60x. This evening I went on to the back garden knowing that the really bright ones were Venus and Jupiter and then pointed it gently at Jupiter. Of course I could not see any pretty lines, but I was amazed that my cheap crappy spotting scope showed me a couple of pin pricks of light surrounding it. Absolutely amazed that having reached the grand old age of 54, I could 'see' some of Jupiter's moons.
Also got a cracking view of the moon.
:-)
This video is not for the nerds. It is for the people who want to be a nerd. I know everthing in this video and probably knew the advance section and I am relativly new to this hoby.
I learned more on this video than I had from my so called photographer cousin who shoots nature pics on auto mode his entire life...
Ah, selling the nerdiness. Even though I probably know what would be in the advanced tutorial, there would be never enough Rory! Ah, you geeky devil, what are you doing to me?!
I spent 3k off the back of your earlier videos then realised I know jack all about photography. (I'm a mechanical engineer) Thanks for the next steps. 🤣
good to see you using the edmund still;) I found a vintage 8 inch celestron starhopper from the 90s that has a pretty good mirror so i upgraded the focuser and spider. only problem is it has a sona tube for the main body so its a total tank and i cant use it on my orion sirius mount:( Im thinking about swapping everything over to an aluminum tube to shed some weight. I may even take the mirror cell out and lathe and drill some weight out of it, It has the optical quality and focal length that would be ideal for galaxies.
What do you know about shooting with charged coupled type cameras? i have an older one made by celestron and have been shooting with it. I know there are differences between cmos and ccd but to know how to truly get a certain gain i have to do a little math and didnt know if youve been in the game long enough to have any experience with these types of cameras. I cant remember what the name of the company that made the camera for celestron but i think they are the same company that makes sbig cameras. I feel a little silly devoting so much time and effort to an antiquated camera but it has a really deep full well and its 16 bit dac and its TEC:). Quite impressive specs for its time and still even out performs some modern cameras. I just wish the q/e was a little higher. Any advice would be great:)
Bortle 4 sky. Pin sharp tracking on the Neq-6 mount (really lucked out with this mount. It tracks at below 1 arc sec almost all the time). 294MC Pro running at 120 gain and minus 20 degrees. 180sec subs. Have ventured to 300sec subs on particularly clear/still nights and/or faint objects. But nearly always end up back at the 180sec sweet spot.
been on a bit of a binge recently. Hoping 2023 will be my toe dipping into astrophotography. I’d love some advice on location. I see you doing a lot of stuff from a roof in centralish London which is reassuring that I may be able to get decent results without going to the middle of the peak district. But it would be good to have a short video or info on location. comparing eg city vs countryside, perhaps a few select spots that are good options but close to bigger cities?
For some mirrorless cameras bulb time is actually limited internally to one-minute exposures. Then they are stacked internally
I kissed a gran and I liked it. Always great to have new Astro Biscuit 🍪 video.
Oh I have had my histogram set to brightness instead of RGB.
I will also try ISO at 1600 in my Canon 1100D.
First nerd here🤓
Bro big fan 🎉
I don’t have any astro gear😢
Could you do a video on taking a photograph of this new comet.
I use Nikon DSLRs and ISO 200 or 400 seems to work the best in those specific cameras :)
I'm dropping my Patreon. 1 video a month shouldn't be too difficult to manage..
This basics of how a camera works would also answer all those idiots in the various ISS and Artemis live feeds constantly asking 'where are the stars' in video and photos of the earth and moon. Cameras, learn how they work kids.
Hey man I'm not a nerd (yet) I'm really new to this and trying to learn as much as possible as quickly as possible before I spend a big chunk of change on a scope plus various other stuff like mount, so maybe don't say at the beginning of your video that your not welcome. I really like Rory and the channel too, it was this channel that first sparked my interest and started this journey for me 😜
@Grace Stephanie wtf are you on about bot? It's about astrophotography you silly ad bot
I don't necessarily agree with the ISO settings for DSLR. In my opinion it is best to check photonstophotos for optimal dynamic range and read noise. In case of nikon ISO levels of 200-400 are much more common. ISO 800-1600 is more of a Canon thing, they also seem to have noticable banding in newer models if a lower ISO level is choosen.
Agreed. My Nikon D7500 has a definite drop in noise at ISO400, and very little benefit above that. Having said that, if I were to shoot at ISO1600, it wouldn't be bad. I'm limited more at the moment by mount tracking than by the histogram going too far to the right. But if you have good tracking and a lot of light pollution, then dropping the ISO down to 400 would definitely help.
as a total beginner looking at using my DSLR with a star tracker. But my garden is small and south facing. Is there an alternative to polar alignment if you can’t see polaris from your shooting location? Seeing your roof/balcony filming imagine if your house was blocking polaris - thats what I have
Bunny is the best! Bunny, named "bunny" :DD
Hey😁 just wondering if you have any footage of the Jupiter/Venus conjunction that is currently happening?🙏🏽❤👀😉
When does signal swamp out read noise though and is it a function of target brightness and light polution?
is there an exposure length where the signal noise starts to become an issue? Or is that covered with the calibration shots you’d take? oh no this sounds like it might be covered in the advanced stuff?
Fun fact, I arrived at the same conclusion after years of trying, reading and learning more about noise than I ever intended. ISO1600, 60-90s works for 99% of my pictures. And I just checked my histograms - they look ok 😉