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But you can decrease it. Here's why. Introduction to Deconvolution Part II 

Deep Sky Detail
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Ever wonder why people talk about "PSFs" in astrophotography? Well, a PSF makes your image blurry, so your can never have a perfect image. I go into detail about what can affect a point spread function in this video.
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28 май 2024

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Комментарии : 21   
@deepskydetail
@deepskydetail 2 месяца назад
To try everything Brilliant has to offer-free-for a full 30 days, visit brilliant.org/DeepSkyDetail/ You’ll also get 20% off an annual premium subscription. Also, note that the 134/D formula is in arcseconds. (1.22 x lambda)/D is in Radians!
@8gonzalo411
@8gonzalo411 2 месяца назад
Hi. Nice video. did I understand correctly? For my telescope 8" D = 203.2mm λ = 0.000656 mm (H-alpha filter 656 nm) R = (1.22 * 0.000656) / 203.2 R = 0.000003228346457 rad R = (0.000003228346457 * 3600 * 180/π) arcsec R = 0.6658942564 arcsec
@deepskydetail
@deepskydetail 2 месяца назад
@@8gonzalo411 Yes! That looks right to me! The quick and dirty formula (134/203) gives about 0.65, so a similar answer! Side note: I wish I had made it clear in the video that the second formula was for radians.
@whyf16uy
@whyf16uy 2 месяца назад
Well I learn something every time.
@deepskydetail
@deepskydetail 2 месяца назад
Thank you! You've made my day :)
@avnirsoni6173
@avnirsoni6173 2 месяца назад
This was an excellent explanation of psf! Thanks for sharing the knowledge!
@deepskydetail
@deepskydetail 2 месяца назад
Glad it was helpful!
@Santosssz
@Santosssz 24 дня назад
Brooo, everything made sense now
@cratervanawesome
@cratervanawesome 2 месяца назад
Don't forget the atmosphere. It limits seeing to usually above what the average astrophotographer's scope can resolve. EDIT: He did infact, not forget the atmosphere.
@michaeltonge1971
@michaeltonge1971 2 месяца назад
MUCH BETTER! This video was so much easier to follow without the distractions during the more technical bits. Do you think it would be worth calculating the point spread function for different parts of an image to take into account field curvature etc?
@deepskydetail
@deepskydetail 2 месяца назад
That's the goal. But it will take some time to train the model(s) correctly.
@anata5127
@anata5127 Месяц назад
Most critical contributor for resolution is seeing. Rest is minimal. Large scope increases sensitivity, but resolution is still mainly defined by seeing.
@deepskydetail
@deepskydetail Месяц назад
Yes! Which I discuss it being the most important factor around 12:50 ;)
@anata5127
@anata5127 Месяц назад
@@deepskydetail It will be great to present practical aspects related to pixel of camera and FL of scope, etc. For example, do we need 14”scope with FL 2500mm, if we have SCT 9.25” FL 2500mm, our seeing (2-3”; most common good seeing) and camera asi2600.
@Drawliphant
@Drawliphant 14 дней назад
Field curvature is similar to Coma where off axis light is is focused before it gets to the sensor like you'd need a curved sensor for the edges to stay in focus. What you showed instead is spherical aberration where light that went through the edge of the lens is focused before it gets to the sensor.
@deepskydetail
@deepskydetail 14 дней назад
Yes, you're right! Thanks for pointing that out. The visual is misleading. I should have had incoming non-parallel to the axis rays being focused for the field curvature demonstration.
@crateer
@crateer 2 месяца назад
Another incredibly informative video - Thank you so much!
@deepskydetail
@deepskydetail 2 месяца назад
I have fun making them. And thank you for watching! :)
@carvrodrigo
@carvrodrigo 2 месяца назад
Theses videos keeps getting better and better hahahaha thank you friend!
@deepskydetail
@deepskydetail 2 месяца назад
Glad you like them, friend!
@wdavis6814
@wdavis6814 2 месяца назад
Blurry pics come again no more.
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