2010/2/21 Bob Sullivan <[email protected]>: > Rick, > Thanks for looking and commenting. > DOF is a problem and using the autofocus macro will take practice. > There were lots of focus errors in this GESO. > I find myself not concentrating as much as when it was purely manual focus. > Regards, Bob S.
Bob, I've totally given up on AF in Macro. I find it doesn't save time at all and for MF your money is best spent for a split prism focusing screen although even then if you want to focus on a point outside the center of the image you may lose focus from swinging your cam around. What you can do is add a DOF extender device such as a pinhole, e.g. the Zörkendörfer TS-Dehner Set or any other quickley removable pinhole with precisely machined edge. Forget the artsy crap, this calls for precision machining. I have the Zörk for my bellows but no matching adaptor for my DFAs so I cant tell you if the result will illuminate the complete image circle on the sensor/film plane. I'll send the guy a mail if you want me to =) Besides whenever handheld isn't a must I use a tilt/shift bellows and put the focal plane where I like it best. In fact I am thinking very hard about the tilt/shift/rise/swing bellows currently in the bay... if I sold the other one I could perhaps even afford it Cheers Ecke -- 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.
