[OM] Sony A7 mirrorless FF body announced

[usher99]

>>> I'm not sure what he's measuring.

Roger at Lensrentals describes the technique on the optical bench and 
provides references to the testing software.
He freely admits at being surprised he couldn't find an adapter that 
was great as his original focus was elsewhere.
There is ample empirical evidence that the thinner adapters for longer 
registration distance cams only occasionally cause any trouble at all.

http://www.fredmiranda.com/forum/topic/1244559/1


I am not so sure with the MFT situation or especially the high res  FF 
Sony A7r.  I don't think that thinking about how many microns the 
adapter is off planar and
equating that to shifting the focal plane that  same amount properly 
characterizes the issue as the whole lens is then tilted and 
exaggerated by the
longer adapters.  I hope it is indeed a minimal issue.  Seems many WA 
RF lenses are at least working OK r >= 35mm according to MR on A7r.  
Some lenses produce a magenta cast
and some worry about smearing.  These issues are being enthusiastically 
investigated at warp speed it seems.

Mike


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