Watch this BEFORE you buy your ASTROCAMERA!!!
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- čas přidán 5. 09. 2024
- Everything you need to know about OVERSAMPLING & BINNING in ASTROPHOTOGRAPHY
The concept and consequences of over-/undersampling in astrophotography are quite complex and lead to confusion. Join me to look into this topic from the basics to the measures that can be taken to mitigate the problems caused by it.
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creativecommon....
Thanks so much. What a brilliant explanation of this concept. A picture is worth a thousand words.
Well you are the first person that has explained oversampling and binning in a way that I could understand it.
Now I understood for the first time the effect of oversampling and undersampling. I have a picture of it in my head now. Thanks!
I agree that this is the best explanation of over and under sampling I've seen anywhere.
Thanks! This has been so helpful!
So far the best explanation of the oversampling / undersampling. Finally I understand this, thank!
This is the best explanation of oversampling/undersampling I have ever seen; Thanks! I would love to do AP in CH; Every summer when I visit my mother (Gstaad) and brother (Chernex) I amazed (and jealous) by the lack of light pollution.
This is the best explanation of this topic I've seen! Easy to understand, and it turns out that oversampling isn't the end of the world (other videos I've seen have implied it was the end). I have an 8SE, and I only have experience with the ZWO line of cameras. But, none of them that I checked out in Astrotools indicated that there was a perfect camera - all needed at least a focal reducer or binning. I was looking at 183MC or 294 MC Pro, and would be okay with both.
This concept is never spoken about in terrestrial photography circles. I wonder why. Same optical physics; similar cmos sensors.
VERY good point!!!!!! Could it be marketing???? It might dawn to some photographers their very expensive new lens is pointless as the camera can not resolve it.....
@@viewintospace Hmm...if it were marketing the Zeiss APO-owning pixel-peeping fanatics would have exposed it long ago!
What great timing with this video, im looking to buy an astro camera soon, and you've helped me with the information you give.
Very happy that I could help!
OK! But my big question is; "Why do all these imagers on discussion forums say they would rather undersample than oversample?
Watch my recent video about Drizzling and all will be clear.... 😉
I believe the binning example you used, while relatively straightforward, applies to mono cameras. yes? If so, then 2x2 binning for a color camera doesn't use adjacent pixels; rather, it bins the 4 closest pixels with the same color filter (i.e., 4 greens, 4 reds, 4 blues) which won't be adjacent. Astronomers like The Lazy Geek do not use binning on color cameras for this reason. What say you?
Absolutely agree - I used the mono as an example, as the OSC case is much more complex. I would not say "never" use it, but for sure that oversampling much be much more severe that you should bin with OSC cameras.
Nice video!
I have a question if you use a 2600mm with bin 2 you go from 26 megapixels to 6.5megapixels isn't that a problem?
It is not a problem, it is a reality which must be considered when making this decision. If you are substantially oversampled your "real" resolution will anyway only be that 6.5 MP, and then it makes sense to go to bin 2. But in any other case this might not be advised.