More playing with the E-300 + Tamron 90/2.5.
When the Tamron is stopped down to f22 and I take a shot of a blank wall I
get something like this:
http://lrh.structuregraphs.com/images/e-300-tamron-1.jpg
Notice the bright spot roughly in the middle of the frame !
This behaviour starts to become noticeable at around f11.
The problem doesn't occur with the 14-45mm or the Zuiko 85/2 !
I have heard of flare problems (Nikon context from memory) with light
bouncing off the sensor to the rear element of a lens and back again. Could
the geometry of the Tamron be just right to show this effect ?
...Wayne
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