> (asphericality has nothing to do with focus shift per se, btw.)
Agreed. But having the option of using aspherical elements has opened
the door to other lens design options. The see-in-the-dark lenses are
a very good example of this. You can design a lens to perform
admirably at F1.2, but really sucks pond water stopped down. Or you
can have a lens that performs great stopped down but stinks when shot
wide-open. Being able to incorporate newer optical technologies like
aspherical elements and low-dispersion glass has given the designers
the ability to create a lens that is decent across the entire intended
usage range--not just in a narrow usage. Lens design is all about
compromise, though. Something has to give.
> Some sort of Graphic (speed, super, etc.) with a Kodak aero ektar f/2.5
> would be a kick-ass portrait rig, I think.
Hmm. Mine had the standard 'kit lens". Still produced a wonderful
portrait. Unfortunately, I wasn't up to the level that the camera was.
AG
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