Still not happy with the D850 AF

Started 2 months ago | Discussions thread
Leonard Shepherd
Leonard Shepherd Forum Pro • Posts: 20,117
Re: Still not happy with the D850 AF
7

Nils wrote:

Two of them have "area unsharpness" at 2.8 and lower which is quite annoying when you shooting fashion with the 105mm 1.4 and the top is out of focus no matter where you place it.

Presuming the subject is exactly parallel to the sensor either the lens mount or the body mount is not parallel to the sensor.

To check this out use a tripod head which can be rotated through 180 degrees.

With the camera in portrait mode take a shot, then rotate the camera through 180 degree and take a second test shot.

If the out of focus part between the 2 shots moves from top to bottom of the image the lens or camera probably needs a repair. If not the problem might be something other than a lens or camera body.

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Leonard Shepherd
In lots of ways good photography is much more about how equipment is used rather than anything else.

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