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Autofocus Sony A7 III vs A6400, A6600, A7R IV.


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Hello fellow photographers,

I am a amateur wildlife photographer. I am interested to switch from Canon to Sony.
I am having some problems making the dissicion which camera i should buy. I am going for the Sony 200-600 lens but do not know what camera I should use with it. The a6400 and a6600 have the new autofocus system, but are very small and miss some important features for me. But the Sony A7R IV is to expensive for me. Here is my question: Did the Sony A7 III get the same new autofocus system as the a6xxx and the A7R IV in the most resent firmware update. 

I would be very happy if someone could help me out choosing the correct camera for my needs.

 

Kind Regards,

Tim

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Hi Tim,

As far as I know the both a quite similar. Both feature eye autofocus for humans and animals, but only the a6600 has eye autofocus in video mode. The a7iii on the other hand has more focus points, covering a little more of the screen.

Main difference to decide on is the crop factor, which has its advantages and disadvantages...

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  • 4 weeks later...
  • 1 year later...

Hi Tim, 

      Best bet for wildlife photography is the a6400. I shoot mostly Birds.. birds on perch has a very good resolution in a6400  with 200 600mm. Birds in Flight can be use to but quite challenging and must have some skillful technique, but if you made good focus, the resolution is great.. I mostly use the a9 in birds in flight for great percentage of autofocus..

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    • I mostly see posterization artifacts, which are the result of lossy compressed RAW files (or bad jpeg conversion). Unfortunately, the A6400 doesn't offer uncompressed or lossless compressed RAW. The noise might indeed result from the smaller sensor than what you're used to. If you're not shooting at max aperture, you could try shooting at wider aperture and lower ISO. When you're not shooting at max aperture, fullframe versus APS-C shouldn't matter much in terms of ISO-performance combined with depth of field: at the same ISO and aperture value, fullframe offers better noise performance but with a narrower depth of field. This can be offset by choosing a larger aperture and lower ISO on the APS-C camera. If you want a fullframe camera the size of an A6400, try the A7C(ii).
    • ..unfortunately, the lighting was correct. The shot required deeper shadows. The K1 ff didnt have these banding issues [yes, I know the sensor is larger]. The film shots had details in the same light. The sony files, both the jpg and raw, had this banding/noise - with NO retouch or post adjustments [straight out of the camera]. the camera was purchased new a few years ago and I am trying to determine if there is something wrong, or the settings are wrong, or the camera just cant handle this kind of lighting [studio + softbox]. No shadow detail is one thing... banding/noise in the shadows is unacceptable. Does sony have a body this size that is FF ? Im wondering if that would make a difference..  dw
    • The root causes for banding are uneven lighting, incorrect exposure settings, or compression artefacts or certain kinds of artificial lighting, especially LED lights. Also the lens used plays a role, I have noticed it more with my sharpest lenses, looks like they outresolve the sensor when I have a uniform blue sky. There is more than one solution, and ultimately post-processing, but the root cause has to be identified first.
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