Problem with Sony A7, reflections on the sensor.

Started 10 months ago | Discussions thread
seachicken2000
Senior MemberPosts: 2,767Gear list
Like?
Re: Could it be related to PDAF sensel pattern?
In reply to ProfHankD, 10 months ago

ProfHankD wrote:

martindesu wrote:

But some reports suggest this isn't an issue with the A7R...

Well, there is a chance that it has to do with either the spectral properties or some aspect of the sensor stack. I suppose the most likely part of the stack would be the microlenses. If so, it would involve a very specific interaction between that particular lens and the microlenses. I suppose there is a possibility that it has to do with the pattern of PDAF sensels...?

There's a post earlier in this thread (and another on Ken Rockwell's site) showing this flare pattern with the A7, and not with a Leica, for images shot in close to identical conditions. This seems to point the finger at the sensor.

Sensor-related explanations I've come across:

  • The sensor itself acts as a diffraction grating causing the dot patterns
  • The patterns are caused by reflections of the sensor on the sensor toppings
  • The patterns are caused by reflections of the sensor on the rear element of the lens

The array of dots in the flare, does look rather like an interference pattern.

-- hide signature --

A rose by any other name is still a chicken.
http://500px.com/seachicken

 seachicken2000's gear list:seachicken2000's gear list
Sony Cyber-shot DSC-R1 Fujifilm FinePix S2 Pro Sony Alpha NEX-5 Sony Alpha NEX-7 Sony Alpha 7R +18 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
5N?New
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow