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Adrian Jones wrote:
Tim Dollear wrote:
very nice series. Good question on the aperture on the MPE-65, btw.
Thanks Tim, appreciated, hope I got the info on effective aperture correct in my reply above!
Adrian
You did, Adrian! It's in the manual, effeective f = f x (magnification + 1)
so, f2.8 at 5x = 2.8 x (5 + 1) = f16.8
Also, in the manual the DOF table for different magnifications and f-number:
At 5x, the DOF is 0.095mm at f5.6, and 0.134mm at f8 (!) Any higher, and the Diffraction Troll will eat your shots alive.
Ref. Brian's excellent diffraction post here:
http://www.fredmiranda.com/forum/topic/684385
And BTW: No responsible person will ever recommend the MP-E as a first macro lens, for good reasons. And buying one, thinking you'll automatically have pictures like these produced here by Adrian is a fairly naive idea, to put it politely 
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