----- Original Message -----
From: "Shel Belinkoff"
Subject: Re: OPTICS AND "KILLER GLASS"



> The sharpness, detail, and contrast of many RF lenses wide
open, or at
> wide apertures, is quite a bit better than many SLR lenses.
The 35mm
> Summicron is outstanding at wide apertures, as is the 50mm
Summicron.
> While I recognize that this is a generalization, I cannot help
but
> wonder why SLR lenses are nowhere near as good wide open as RF
lenses.

The flange to focal plane distance made necessary by the mirror
box forces all sorts of optical compromises in the SLR that are
not needed in RF cameras.

William Robb
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