On 2016-03-14 12:39 , John wrote:
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.
he said he didn't notice *severe* vignetting — and i looked through a 92%
viewfinder, at a bright uniformly-lit area, and could see moderate vignetting
What you can *SEE* through the viewfinder might not give you a usable
answer.
i agree, it's hard to judge moderate vignetting, and one could easily miss
minor vignetting; i was talking about the theoretical relationship of
aperture to vignetting though
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.
i could have too, i had film in my camera, but it didn't seem worth the
effort to find batteries and use up the roll; i could already see vignetting
and i had seen what seemed to be a vetted list saying it should not vignette
if stopped down to an unspecified aperture; i'm content to wait to find out
how much and what apertures when someone does a test with a K-1
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
