Hi Boris, The sheet for a gadget (don't remember the name) I use for such calibration says there is no right focal length.
You can either select the length you use most frequently (perhaps better) or, select a length in the middle. In any case, the calibration will not be perfect at 17mm and 70mm (assuming you haven't calibrated for these). In the absence of a physical defect and with a x3 zoom like yours, the calibration should still work acceptably. Bulent --------------------------------------------------------------------- http://patoloji.gen.tr http://celasun.wordpress.com/ http://www.flickr.com/photos/bc_the_path/ http://photo.net/photodb/user?user_id=2226822 http://www.pentaxphotogallery.com/artists/bulentcelasun 2014-01-25 Boris Liberman <[email protected]>: > Hi! > > It would seem to me that my Sigma 17-70 requires fine focus adjustment with > my original K-5 camera body (formerly Galia's)... > > I'd like to ask the wizards of PDML - what focal length to choose for dial > in process? > > Thanks in advance. > > Boris > > -- > 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.
