usher99@xxxxxxx wrote:
> Thanks Moose for the very interesting and elegant experiment.
Glad you liked it! I certainly feel more secure in knowing more about
how I can use the lens successfully.
> Any dandelions here are under 6 inches of the white stuff ;-(.
> Also makes me thing that macro lenses that achieve magnification by shifting
> internal elements and not just extension may have a slight advantage from a
> diffraction vantage point as the optical path is shorter. Whether this
> hypothesis violates the "no free lunch" principle, I am not sure.
Probably no free lunch. The IF prime macros shorten their focal length
as they focus closer. The makers, don't advertise it, but it's true.
Moose
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