I've had it for over a year but thus far I've rarely shot flat subjects wide open and I'm not much of a pixel peeper so it may well have escaped me until now. I'll go for the wall then. The idea was to have something to show to Pentax when I drive over there. Ecke
2010/11/29 paul stenquist <pnstenqu...@comcast.net>: > For a flat focus test all you need is a textured wall, a tripod and a level. > Just make sure the camera is parallel to the wall and the lens is > perpendicular to the wall. Then shoot wide open. It was easy to spot the > focus error on my first 16-50. But this is an assembly problem that generally > shows up immediately. How long have you had the lens? > Paul > > On Nov 28, 2010, at 6:07 PM, eckinator wrote: > >> hi all >> a lot of the photos taken today lead me to think my 16-50 may be >> decentered - there is tons on inexplicable softness in an otherwise >> flat field - can anyone please point me towards a link with a chart >> that will help me to illustrate the problem for when I turn the lens >> in for repair ... again ... >> thanks in advance >> ecke >> >> -- >> 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. > > > -- > 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. > -- 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.
