On 3/13/2016 4:38 PM, steve harley wrote:
On 2016-03-12 11:52 , John wrote:
You wouldn't see it unless the lens was stopped down. Maybe not even
then if it gets too dark in the viewfinder.
that's the opposite notion from what i've seen expressed — that stopping
down reduces or eliminates vignetting
Larry said he put the lens on a film body and looked through the
viewfinder and didn't *SEE* vignetting.
What you can *SEE* through the viewfinder might not give you a usable
answer.
You could use the DOF preview function to stop the lens down to it's
taking aperture, but just looking through the viewfinder it might be too
dark to see clearly whether or not it's vignetting. And it might not
show 100% of the frame.
The only way to know for sure is to make a photograph, which Larry could
have done while the had the lens mounted on that film body.
--
Science - Questions we may never find answers for.
Religion - Answers we must never question.
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
