john vanderaalst wrote: > A week ago, I shot a few slide-films (Fuji 200) with my old SF1n and a > few different lenses. I used to make many slides in the past, but > changed to printfilm some years ago. > All slides made last week look fine, perfectly exposed - except those > made with the Pentax SMC 4/28-70 which all look overexposed at least one > stop. > I've checked the 28-70, but it looks perfect: aperture goes smoothly, > automatic stop-down mechanisms works fine. > I've compared the 28-70 with another similar model, both "made in > Japan"-versions, and upon visual inspection only one seems to have, at > identical focal length and aparture settings, a somewhat larger diameter > in the selected aperture than the other. To my view, not enough to make > for the one stop overexposure. > But again, both lenses seem to work perfectly. > Is this just a matter of tolerances, and have tolerances in modern > zoom-lenses become that large that they are just too big for slide film > ? Does anybody have similar experiences with the 4/28-70 ? > -
I have the FA 28-70/4.0 & almost exclusively shoot slide film, usually spot metering. I keep exposure notes for each image, any exposure errors with my 28-70 were from my errors not from the lens. -- David S. Nature and wildlife photography http://www.sheppardphotos.com - 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 .
