> I don't know. I always believed "vignetting" was a term used mainly to
> describe something else obstructing the angle of view (as you say a lens
> hood, filter, or even the outer part of the lens itself).
> I may be wrong but I though light fall-off was the "optical" version of
> vignetting. The failure of the lens optics to adequately illuminate near the
> edges of the frame.
We've debated this here on the PDML before, but without reaching a
consensus. However, my way of thinking does agree with yours,
Brendan. That is, vignetting is the term properly used to describe
the result of some mechanical structure (e.g., a hood, a filter
ring, or the lens barrel itself) cutting off light on its way to the
film. On the other hand, fall-off is the term that refers to uneven
illumination at the film due to optical ("glass") reasons, more
common in wider FL lenses. But, only some of us will agree...
Fred
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
