AG Schnozz wrote:
> Dr. Flash wrote:
>
>> Given that 2-1/4 medium format lenses normally don't have to
>> resolve as much detail as a 35mm lens it may be that the Hassy
>> could have as much or more trouble resolving them tiny
>> pixels as the Canyon glass.
>>
>
> I'm not sure how that theory started, but I'll put *most* Hassy
> lenses up against 35mm lenses any day. And how about large format?
> There's some really awesome large-format lenses which really stomp
> that theory.
Is it possible that you and Dr.Flash are saying different things?
At the same distance and with the same angular coverage lenses and with
the subject the same physical size on a large print, I agree with you
that MF and LF will generally outperform 35 mm; the larger the display
size the more so. This is about system resolving power at display size.
However, if you take the images with the same focal length lenses and
blow up 24x36 portions of MF and LF film the same amount as the 35 mm
frame, I believe you will find the 35 mm to be better. This is about
absolute lens resolving power at the film plane.
As Winsor has pointed out, photo magazine tests used to show such a
difference in lens resolving power.
I also don't believe in free lunches in optical physics. The possibility
that an 80 mm lens that has to cover an image circle of 114 mm can be
designed to resolve the same lp/mm in the center, let alone the edge as
one that only has to cover a 44 mm image circle, assuming the same
quality design, glass, coatings, etc., seems simply unlikely to me.
There is certainly no other area of optics and photography where
compromises aren't necessary. Back in my days as a physics student last
century, I might have even been able to mathematically prove it - or
not. :-)
> However, if the theory IS TRUE, then the E-system should be far superior to
> Full-Frame 35mm format. Right?
>
In system resolving power at display size, wrong at large display sizes.
In absolute lens resolving power at the film plane, right. I assume here
for theoretical reasons no interference from an AA filter.
Moose
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