Re: Exact fl of lenses... 220 VR

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

>        As I mentioned before, 4 mm off on fl, creates blurred edges in all
> my tests,  if that is acceptable to some people, then this should not
> concern them.  If you are after big enlargements, then one better be
> careful...

I agree. You must know the focal length but this is not a factor that changes
with the exposure time you use on the camera, ... is it? That is my
"objection". The focal length of a given lens is not a variable. To determine
the focal length of a lens precisely one uses a nodal slide generally. Most
lenses are stamped with approximations to their actual focal length. For
precision panoramic work you should go to the trouble of determining the actual
focal length of the lens.


Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
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