[Leica] Center filters

["A. H. Ongun" <ahongun@ecsysinc.com>]

Tom,

That's absolutely correct, and that is why Schneider sells center filters
made specifically for each of their wide angle large format lenses.

andy

- -----Original Message-----
From: owner-leica-users@mejac.palo-alto.ca.us
[mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of Tom
Schofield

I have always wondered whether use of filters is more problematic with
extreme wide angle lenses.  It seems to me that, while at the center, the
light path is perpendicular to the filter, at the edges, the light path is
more oblique.  It therefore strikes the filter at an oblique angle, and
travels through more glass than at the center of the image.  Therefore, I
would expect degredation, or at least differences, at the outer areas of the
frame.  What are your thoughts on this?

Tom