re: Realist f/3.5 DW lenses

[P3D Richard M. Koolish <koolish@xxxxxxx>]

Bob Howard writes:

> I often think the vignetting reported is from using round lens
> shades and filters that with depth of field at f/16 image the shade!

No, this is not the cause.  I don't use lens shades and still get
vignetting.  If you take the back off the camera and look from the
corner of the film plane into the lens, and then pass a pencil point
in front of the lens, you can see that as the pencil point reaches the
edge of the black ring in front of the lens you can see it from the
back.  This says to me that the front lens ring is being included in the
image and is therefore vignetting.


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