Joined: 25 Nov 2014 Posts: 195 Location: Connecticut
Posted: Sun May 06, 2018 10:28 pm Post subject: Trouble with A7R2 Sony
Some new unseen problem came to my A7R2. The pictures upper edge is gradually dark on open aperture, it disappears when diaphragm closed down. If not this, I would say that it is a shutter's problem, but it's not. How can this be explained?
Here are the samples, 200 f3,5 lens, one done with open, another with f5,6 :
IMO it's still a shutter problem with shorter exposures. With the diaphragm wide opened the exposure is shorter and the curtains open and close coupled allowing a slit.
With the diaphragm closed the curtains open and close separately. Probably the problem is when the curtains are moving coupled allowing a slit.
The first photo was taken with 1/6400 shutter speed. My guess is it is a shutter problem. Try using other lenses at that shutter speed. I would expect all lenses will show the same dark band. My A7 does..
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