Strange images with new high resolution Sony A7RIV

In article e8d9df39-c30b-488d-9292-
, says...

This thread from Dpreview showed some pretty "off" looking images from an A7RIV 60mp camera. Looking at them, it almost looks like the pixels didn't combine properly to form true-colour images. Some tried to blame atmospheric effects but high-magnification views indicate something is wrong. Even the close-up image of the bird at the end, it just looked bad at high mag.

Similar shots using a m4/3rds camera and a 1200mm equivalent focal length showed none of this aberration.

https://www.dpreview.com/forums/post/63748514

Seems a combination of camera shake and heavy high ISO noise
reduction (he shot that at ISO 5000). In addition, there is some
visibke chromatic aberration.

It's the curse of the 61MP: he increases the shutter speed to
absurd levels (1/3200 s) to get around the camera shake issue,
but still gets camera shake, and is forced to use very high ISO
which on a camera with small pixels such as this one degrades
the image.

He should have used a tripod and much lower ISO.

And perhaps the Sony A7 R4 shouldn't be used for wildlife
photography.
--
Alfred Molon

Olympus 4/3 and micro 4/3 cameras forum at
https://groups.io/g/myolympus
https://myolympus.org/ photo sharing site

On Sat, 21 Mar 2020 16:13:09 -0700 (PDT), RichA
wrote:

On Saturday, 21 March 2020 04:16:35 UTC-4, Alfred Molon wrote:
In article e8d9df39-c30b-488d-9292-
, says...

This thread from Dpreview showed some pretty "off" looking images from an A7RIV 60mp camera. Looking at them, it almost looks like the pixels didn't combine properly to form true-colour images. Some tried to blame atmospheric effects but high-magnification views indicate something is wrong. Even the close-up image of the bird at the end, it just looked bad at high mag.

Similar shots using a m4/3rds camera and a 1200mm equivalent focal length showed none of this aberration.

https://www.dpreview.com/forums/post/63748514

Seems a combination of camera shake and heavy high ISO noise
reduction (he shot that at ISO 5000). In addition, there is some
visibke chromatic aberration.

It's the curse of the 61MP: he increases the shutter speed to
absurd levels (1/3200 s) to get around the camera shake issue,
but still gets camera shake, and is forced to use very high ISO
which on a camera with small pixels such as this one degrades
the image.

He should have used a tripod and much lower ISO.

And perhaps the Sony A7 R4 shouldn't be used for wildlife
photography.

Interestingly, most pro wildlife photogs I've seen still use pro camera bodies with 16-24mp...

Some years ago I deliberately bought a 24MP D750 in preference to the
36MP D810 because of my concern about the kind of issues you have
mentioned.
--

Regards,

Eric Stevens

On Sun, 22 Mar 2020 02:34:56 -0700 (PDT), RichA
wrote:

On Saturday, 21 March 2020 19:56:06 UTC-4, Eric Stevens wrote:
On Sat, 21 Mar 2020 16:13:09 -0700 (PDT), RichA
wrote:

On Saturday, 21 March 2020 04:16:35 UTC-4, Alfred Molon wrote:
In article e8d9df39-c30b-488d-9292-
, says...

This thread from Dpreview showed some pretty "off" looking images from an A7RIV 60mp camera. Looking at them, it almost looks like the pixels didn't combine properly to form true-colour images. Some tried to blame atmospheric effects but high-magnification views indicate something is wrong. Even the close-up image of the bird at the end, it just looked bad at high mag.

Similar shots using a m4/3rds camera and a 1200mm equivalent focal length showed none of this aberration.

https://www.dpreview.com/forums/post/63748514

Seems a combination of camera shake and heavy high ISO noise
reduction (he shot that at ISO 5000). In addition, there is some
visibke chromatic aberration.

It's the curse of the 61MP: he increases the shutter speed to
absurd levels (1/3200 s) to get around the camera shake issue,
but still gets camera shake, and is forced to use very high ISO
which on a camera with small pixels such as this one degrades
the image.

He should have used a tripod and much lower ISO.

And perhaps the Sony A7 R4 shouldn't be used for wildlife
photography.

Interestingly, most pro wildlife photogs I've seen still use pro camera bodies with 16-24mp...

Some years ago I deliberately bought a 24MP D750 in preference to the
36MP D810 because of my concern about the kind of issues you have
mentioned.
--

Regards,

Eric Stevens

The Sony is capable of some remarkable images under controlled conditions, but control is the key.

Some of my best images come from a hand held D70. Extreme control is
not always essential. Having said my ability to hold a camera
adequately still is not what it was and I am increasingly using a
tripod.
--

Regards,

Eric Stevens