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08-30-2019, 12:20 AM   #16
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Join Date: Apr 2012
Location: Lancashire, UK
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Posts: 741
I was very impressed with the results from P67 500mm f/5.6 on my 645D when I did some test shots: Test shots from a 645D & SMC 67 500mm f/5.6 with 100% crops - PentaxForums.com

Ok they're not full frame 645 and the mirror will be smaller than a 645n, but in terms of IQ I can't fault the coverage on 33x44.

The key to the results seems due to the clear day and good atmospherics (which I didn't really appreciate at the time). Since shooting them last week, on no days since has it been as clear. It's not something I noticed in the finder when l took the shots.

I haven't tried it on my P67 yet, it's quite a heavy lump to lug about and setup, but once on the tripod it handles very well for its bulk.

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2x, 300mm, 645d, 645n, 645z, 67ii, camera, dof, film, im, issue, lenses, medium format, mirror, shutter, times
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