Mark C wrote: >That is interesting. > >I am trying to grok why it would not work at infinity on a full frame >camera. I assume it must be vignetting though typically vignetting would >be more pronounced at full extension (i.e. in macro mode) and not at >infinity.
Not vignetting but light falloff. The lens produces an image sized for an APS-C sensor... in general use. But for close focusing the lens is extended farther away from the image plane (sensor) and thus projects its image over a larger area. Large enough for a full-frame sensor. -- Mark Roberts - Photography & Multimedia www.robertstech.com -- 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.
