Hand Tools

Subject:
Re: We will be going 100% sharpening perv...

Patrick Chase
Poking my head over the WC parapet, having read a lot of David's writing elsewhere....

Do you happen to know the effective resolution (um per pixel) of that rig at maximum magnification, and the resulting effective f/#.

I've been satiating my shameful sharpening compulsions with a 5X macro lens (Canon MP-E 65) on a 20 Mpix digicam (Canon 1Dx II). The resulting pitch is 1.3 microns/pixel at the subject, but the catch is that the lens' effective aperture at that magnification is f/16 wide open (and f/22 when stopped down a bit to optimize quality). The resulting diffraction-limited resolution is more like 4 um at the subject.

EDIT: I looked at the auction-site listing and it doesn't call out numerical aperture, which is what determines resolution (assuming minimal aberrations). My macro lens has an NA of .32 at 5X, which is on par with cheap metallurgical scopes.

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We will be going 100% sharpening perv...
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what microscope?
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Evaluation
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This thread has more tangents than...
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