A few weeks ago I reported getting a bright blob in the centre of the frame
of my E-300 when I used it with the Tamron 90/2.5 macro (+MF-1 adapter).
With that lens the blob was worse at the smallest aperture (f32) when
focussed at infinity.
See this link for an example:
http://lrh.structuregraphs.com/images/e-300-tamron-1.jpg
I have since tested a number of lenses and only found 2 lenses that
obviously exhibit the behaviour, they are the Tamron 90/2.5 macro and a
Nikon Series E 50/1.8.
I'd be interested if anyone else with the Tamron 90/2.5 and MF-1 has noticed
this on other E bodies.
...Wayne
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