On 6/22/2011 6:09 AM, Sawyer, Edward wrote:
> Maybe something to do with the aperture ring becoming uncoupled from the
> rest of the lens when racked out to 1:2? With the double helicoid on the
> 90/2, sometimes I have heard of that happening when it's fully extended, the
> linkages get buggered and mis-aligned.
To the best of my recollection, this may have happened with mine. Pop off the
back, realign the aperture actuation
lever, screw back together.
It wasn't very good closer than about 1:4, so my solutions were first to not
focus so close, and second to sell it.
Moose
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