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06-28-2014, 01:22 PM   #1
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67 lens with 67 extension tubes on 645d

Has anyone used a p67 lens with p67 extension tubes with 67 to 645 adapter on pentax 645d camera?
Wondering if it would work? Would it put excessive strain on diaphragm mechanism on 645d?


06-28-2014, 01:28 PM   #2

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I've used the 67 300mm ED with tubes on the 645D; no problem (auto diaphragm too).
06-28-2014, 01:42 PM   #3
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Original Poster
Cool was thinking about using with 300mm as well to make closer focusing of that lens.

06-28-2014, 04:44 PM   #4

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If you were thinking of using the older 300mm with tubes, remember that this lens has no tripod mount and small amounts of mirror or shutter vib will affect it.


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