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  1. Galleries
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  3. Astrophotography
  4. » My first Andromeda at 135mm

 
My first Andromeda at 135mm...

Notturne

View gallery (15 photos)

My first Andromeda at 135mm sent on August 21, 2020 (16:00) by Leonardo F.. 7 comments, 684 views. [retina]

, 2 sec f/2.0, ISO 12800, tripod.

Immagine ripresa senza astroinseguitore. 490 foto scattate con Sony a7 e Samyang 135mm, allineate con DeepSkyStacker e processate con photoshop, crop centrale delle immagini. 2", iso 12800, f2. Fotocamera spostata per ricentrare la galassia ogni 100 foto



View High Resolution 24.6 MP  



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avatarsenior
sent on August 21, 2020 (20:00) | This comment has been automatically translated (show/hide original)

I read the work behind it..... Gasp!
Compliments
Claudio

avatarjunior
sent on August 23, 2020 (0:13) | This comment has been automatically translated (show/hide original)

Really kindssimo, thanks for the visit!

avatarsenior
sent on August 24, 2020 (8:06) | This comment has been automatically translated (show/hide original)

sin that it's all out of focus you would have gotten a lot more

avatarjunior
sent on August 25, 2020 (9:47) | This comment has been automatically translated (show/hide original)

Hello Juno thanks for the pass, you besides being slightly out of focus is very very cropped, this is a 100% of the initial image so the defect stands out a lot (and I was very convinced to have put well in focus! I should have double-checked well before taking more than a thousand photos :-D)

avatarsenior
sent on September 02, 2021 (17:24) | This comment has been automatically translated (show/hide original)

with that lens, at least in my copy, the infinite focus is at about 2/5 of the symbol " l___ " at the end of the MAF ring. Maybe from specimen to specimen changes a little, I advise you to do a test and impress in mind on a visual level as the bezel must be, and each time focus using this "trick" instead of the MAF on the stars. For the rest, great start! If you happen again, use 3" (even 4 you could, but better stay safe): on FF they are adequate not to see moved.

avatarjunior
sent on September 03, 2021 (15:28) | This comment has been automatically translated (show/hide original)


avatarsenior
sent on July 16, 2022 (15:34) | This comment has been automatically translated (show/hide original)

The problem in these cases is not only the focus. It will still be impossible to have an incisive image in fine details at 135mm, with that sensor, you are in very strong subsampling, standing at 9 arcseconds per pixel.
At 300mm the situation would not improve much, indeed, you would probably have big chasing problems.


RCE Foto

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