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Archive 2018a7rIII vs a9 for Astrophotography
p.2 #1a7rIII vs a9 for Astrophotography
If you’re planning on using an actual telescope for AP then keep in mind that most scopes don’t cover a FF sensor until you get into 100mm refractor land.
That aside, I’d go with a full spectrum modified A7R.
That aside, I’d go with a full spectrum modified A7R.
Aug 17, 2018 at 08:36 PM
p.2 #2a7rIII vs a9 for Astrophotography
Not totally true.. a 8-inch or 10-inch f/4 imaging newtonian will cover full frame. Other scopes like the Meade or Celestron cassegrain scopes will do well also, they are usually f/10 or f/11 though, way to slow. The f/4 newts are best. But you need a good mount. It all adds up quick. Refractors are slow too sometimes, it’s expensive to buy a f/4 or faster one. I used to have a 300mm f/2.8 Nikon lens, that was the best.
stjarvis wrote:
If you’re planning on using an actual telescope for AP then keep in mind that most scopes don’t cover a FF sensor until you get into 100mm refractor land.
That aside, I’d go with a full spectrum modified A7R.
stjarvis wrote:
If you’re planning on using an actual telescope for AP then keep in mind that most scopes don’t cover a FF sensor until you get into 100mm refractor land.
That aside, I’d go with a full spectrum modified A7R.
Aug 17, 2018 at 09:57 PM
p.2 #3a7rIII vs a9 for Astrophotography
Some recent images with my A7rIII. I need a dark location... light pollution sucks!!!
Nikon 500mm f/8 mirror lens
Comet Wirtanen 500mm f/8
Nikon 500mm f/8 mirror lens
Comet Wirtanen 500mm f/8
Dec 14, 2018 at 10:22 PM
p.2 #4a7rIII vs a9 for Astrophotography
jwhatts wrote:
The A9 will likely have better signal/noise ratio and be better for single frames. If you know how to stack and layer different exposures, I'd roll with the R2 or R3 everytime for that extra sharpness.
And as someone who agonized over star eater for the longest time, it's absolutely 100% overblown in practice. For me it's the principle, Sony shouldn't be doing anything to raws, that's why they're raws.
But it makes no real difference to how your final shot looks. If you're happy with the results, great! In fact, many serious landscape astrophotographers actually remove stars in post...Show more →
Yep. I shot the A9 next to the 7R2 in the desert between Vegas and Mesquite and found the A9 images coming away much cleaner.
Then I downsampled the 7R2 files to match the output of the A9 and there was no difference.
Totally agree on the Star eater deal. A little overblown. Well, probably a lot overblown in practice.
The A9 will likely have better signal/noise ratio and be better for single frames. If you know how to stack and layer different exposures, I'd roll with the R2 or R3 everytime for that extra sharpness.
And as someone who agonized over star eater for the longest time, it's absolutely 100% overblown in practice. For me it's the principle, Sony shouldn't be doing anything to raws, that's why they're raws.
But it makes no real difference to how your final shot looks. If you're happy with the results, great! In fact, many serious landscape astrophotographers actually remove stars in post...Show more →
Yep. I shot the A9 next to the 7R2 in the desert between Vegas and Mesquite and found the A9 images coming away much cleaner.
Then I downsampled the 7R2 files to match the output of the A9 and there was no difference.
Totally agree on the Star eater deal. A little overblown. Well, probably a lot overblown in practice.
Dec 15, 2018 at 12:10 AM
p.2 #5a7rIII vs a9 for Astrophotography
gunmetal wrote:
Totally agree on the Star eater deal. A little overblown. Well, probably a lot overblown in practice.
Yeah, so far I've never shown anyone a pic and had them say 'Hey...you seem to be missing some stars...'
Totally agree on the Star eater deal. A little overblown. Well, probably a lot overblown in practice.
Yeah, so far I've never shown anyone a pic and had them say 'Hey...you seem to be missing some stars...'
Dec 15, 2018 at 12:39 AM
p.2 #6a7rIII vs a9 for Astrophotography
Sounds like the a7siii might be coming soon. If you can wait, it might be better than either the a7riii or a9.
Dec 15, 2018 at 08:09 AM