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Your most used focal length range for A.P.?

astrophotography imaging refractor
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#1 Eric H

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Posted 14 August 2019 - 02:00 PM

OK, Astrophotography and refractor peeps. What is your most used focal length range?



#2 Ballyhoo

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Posted 14 August 2019 - 03:38 PM

I am guessing the sweet-spot is 500mm to 600mm of course responses will vary but that will cover most diffuse nebula, like NGC 7000. for galaxies the sweet-spot is a lit higher. 



#3 HydrogenAlpha

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Posted 14 August 2019 - 11:03 PM

Depends on your chip size too. I'm running my setup at 585mm with an APS-H. Previously I was going at 450mm with an MFT sensor, which gives roughly the same fov.


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