The serious 16-50 fault was an uneven focal plane. Shoot a textured wall at f2.8 and f4. Try to keep the camera parallel to the wall. Do several exposures to lessen the chance of operator error. Check the results to see if the focus is even across the frame. If one side of the frame is in focus and the other side is soft, it's probably a bad copy. Paul ----- "Toine" <[email protected]> wrote:
> Since prices are going up I'm warming up for a 16-50. Would it be > possible to do some quick tests in the shop to check if it's ok? What > do I look for? Would a quick test of a wall at f/2.8 and maybe 2-3 > meters distance reveal a lemon? > > Toine > > -- > 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. -- 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.
