Paul Stenquist wrote: >Well, there you have it. Only minor vignetting. Would that increase or >decrease at a smaller aperture?
It's probably falloff, rather than vignetting, and it would improve at smaller apertures. >In any case, it's probably useable on full frame, although I would >think it's optimized for APS-C. Since it was originally designated the "D-FA 60-250" I expect it was designed for full-frame (they probably changed the designation to DA when they decided to eliminate the aperture ring), but since virtually all lenses show some light falloff at wide apertures and are sharper in the center than the corners, any lens could be considered "optimized for APS-C" :) -- 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.
