On Sat, Apr 10, 2010 at 04:11:27PM +0200, Toine scripsit: > Thanks, I'll try that with a UV filter. I knew that some lens designs > need a filter at the end of their optical path. This one doesn't have > a filter thread at the end.
Even when you unscrew the kmount part? I've wound up with a bizarre collection of 30.5mm filters, and interesting scars from figuring out how to screw the filter into a place that assumes either specialized tools or very thin fingers. > The softness is only visible when the lens > is fully extended at 2.5 meter focussing range. It has optical parts > in the front and rear. The rear parts don't move during focussing. > Most likely the contraption is optimized at infinity. Quite possible. I've certainly never seen the lens you've got, so I'm speaking in generalities. -- Graydon -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
