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Old 07-07-2021, 03:44 PM
JA
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JA is offline
 
Join Date: Oct 2016
Location: Melbourne, Australia
Posts: 2,945
Quote:
Originally Posted by baj View Post
Thanks JA

This is a path I have recently gone down. Tossing up between the Nikon D700 and the A7s both with 8.4 micron pixels.

I have gone with the more modern A7s and will use 30 second exposures to avoid bulb mode and the star eater problem that you hear so much about with these cameras.
Oh I forgot about the more recent models. The Sony A7s is an excellent choice and should you need it will also do excellent 4k/30P video from virtually the entire sensor at 1:1. I can't see for astro or your specific applications any further benefit of the A7sII or to go crazy with the A7sIII with 4k/120p. The A7s should be just fine and even if it did exhibit some minor star eater effects (in Bulb mode) , there are too many stars anyway

You can also, with any of them, given their maxISO of ~100,000 turn up the ISO like crazy to help find dim stars for focus and/or gauge composition directly on the LCD display or take a quick high ISO snap.

Best
JA

Last edited by JA; 07-07-2021 at 04:39 PM.
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