I don't know enough physics to answer that but I don't believe that
would be the case. If it were, the problem of a mismatch with Gary's
tests should lessen by focal length increase since telecentricty issues
grow worse the shorter the focal length. I don't recall seeing any such
pattern and any telecentricity issue is further undercut by having the
long teles missing from the lineup.
Chuck Norcutt
Andrew Fildes wrote:
> Would diffraction be worse if the light rays (or is that photons) are
> traveling at an acute angle to the diaphragm edge?
> This would mean that the older lenses would have more difficulty than
> the newer, reduced format telecentrics.
> Andrew Fildes
> afildes@xxxxxxxxxxxxx
>
>
>
> On 12/11/2007, at 1:49 PM, Chuck Norcutt wrote:
>
>> I have to admit that I hadn't thought about pixel diffraction but I
>> doubt that's the cause of the warnings for upper aperture range.
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