uljens wrote in post #18043449
and thats correct.
i thought there were more A7s shooters here, but looks like higher percentage is shooting a7R/a7RII. My fault. Will try to find answers on my questions elsewhere.
Yeah the a7s is sort of a specialized model IMO....so not too many users here. It looks to me that Sony intended this to be primarily a video camera, but obviously there are advantages when shooting stills too. If I still shot weddings, I, like you, would probably consider adding one for the sake of its high ISO performance. BUT the a7rII performs phenomenally at high ISO as well and it might be worth considering that as your main body.
If we look at the DXO mark numbers, in terms of noise (SNR), the a7rII actually performs similarly to the a7s:
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© mystik610 [SHARE LINK] THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff. The a7s has about 1 stop more DR at high ISO past ISO6400, though if we're talking weddings and receptions, you aren't typically dealing with high DR scenes:
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© mystik610 [SHARE LINK] THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff. I can't speak for the a7s AF system, but I did own an a7r at one point and am familiar with the CDAF only AF systems. It's actually reasonably fast and good enough for static subjects. Not very good for subjects in motion or dynamic scenes where you need the AF system to lock quickly without hunting even slightly. The a7rII on the other hand has a very good AF system, which performs really well in low light (a7s has 1 stop better sensitivity though). AF-C eye focus, which only works with the a7rII, is very useful for any kind of portraiture, including weddings.