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Paulius
Joined: 25 Nov 2014 Posts: 321 Location: Connecticut
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Posted: Sun May 06, 2018 10:28 pm Post subject: Trouble with A7R2 Sony |
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Paulius wrote:
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 :
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dan_
Joined: 05 Dec 2012 Posts: 1052 Location: Romania
Expire: 2016-12-19
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Posted: Mon May 07, 2018 3:18 am Post subject: |
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dan_ wrote:
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. |
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Gardener
Joined: 22 Sep 2013 Posts: 950 Location: USA
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Posted: Mon May 07, 2018 4:17 am Post subject: |
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Gardener wrote:
Vignetting + a slight sag in the adapter? |
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dickb
Joined: 04 Apr 2008 Posts: 821
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Posted: Mon May 07, 2018 10:06 am Post subject: |
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dickb wrote:
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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Paulius
Joined: 25 Nov 2014 Posts: 321 Location: Connecticut
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Posted: Mon May 07, 2018 11:50 am Post subject: |
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Paulius wrote:
Thank you. The trouble is the same with all other lenses and stared a couple of month ago. Is it curable? |
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dickb
Joined: 04 Apr 2008 Posts: 821
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Posted: Mon May 07, 2018 12:40 pm Post subject: |
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dickb wrote:
A quick google search shows some people claiming EFCS to cause the problem. Does turning the electronic front curtain shutter off help in your case? |
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Nordentro
Joined: 24 Jun 2010 Posts: 4710 Location: Lillehammer, Norway
Expire: 2015-01-29
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Posted: Mon May 07, 2018 1:49 pm Post subject: |
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Nordentro wrote:
dickb wrote: |
A quick google search shows some people claiming EFCS to cause the problem. Does turning the electronic front curtain shutter off help in your case? |
Yes, this is a well known issue in some cases. Try to turn off El. Front curtain... _________________ Lars | Lens collection | Manuellfokus.no |
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Paulius
Joined: 25 Nov 2014 Posts: 321 Location: Connecticut
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Posted: Mon May 07, 2018 2:28 pm Post subject: |
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Paulius wrote:
I did it, it works!
Thank you all! |
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