I think it's actually a bit less than 10 lpm... more like 8 at
green/yellow wavelengths. And that's theoretical max. Actual
performance will be a bit less.
Dr. Diffraction
Chris Crawford wrote:
I read in Photo Techniques
> magazine several yrs ago that at f45 the theoretical meximum resolution
> possible was a mere 10 l/mm !! Still the image was not soft looking, it was
> good. The Hasselblad 250mm lens might have been a bit sharper at that
> aperture than the 150/2x combo, but I can't afford it and I have the 2x and
> it worked very well!
>
>
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