Jack Davis wrote:
Anyone,
I was asked, by a local camera shop owner, to compare
a Promaster (Hoya) Skylight 1A Multicoated filter with
a shot of the same scene using no filter. Seems a customer claimed they were not getting as
sharp a picture with the Promaster as with whatever
they had been using. A shop employee made a similar
test and according to the owner, the results seemed to
verify the customer's claim.
I just finished a FILM test using the Promaster, a B+W
and a Pentax L39 (67mm).
My question; I used an MZ-S (Provia 100) and an LX
(Kodak Ultra Color 100). The shop owner likes print
film. He has asked me to perform other tests (lens,
etc.) and always insists that the print is what the
film shooting customer sees.
All shots (16 in all) were made with the same lens set
at f/8 with mirror lock-up. Post shot shutter speeds:
LX 1/1000 and MZ-S 1/350. Time span between shots just
moments. Sun movement or clouds (none) not considered
factors.
I realize that the actual LX exposure/shutter likely
varied from pre-exposure reading, but I'm surprised at
how much. Perhaps I'm just the last to discover this.
Were you going to show us something?
mike
