Archived posting to the Leica Users Group, 2017/01/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Thu, 26 Jan 2017 "Frank Filippone" <red735i at verizon.net>wrote: >... >... >... >I should mention that even with a Digi-Leica camera body, focus shifting is >an issue. It is inherent in the specific lens design. There is no camera >body based fix possible. With a EVF, you have the ability to correct >it.... >Using more DOF ( smaller aperture) will help mask this error source. >Your other choice is to not use focus shifting lenses..... or suffer trying >to get really sharp focus on your subject by focusing initially at shooting >aperture, which will be frustrating, especially at F32 ( for example). >... >.. >... >Frank Filippone >Red735i at verizon.net <Red735i at verizon.net> ========================================================================================================================== A concern with f/32, or even f/16 on FF or smaller sensors is diffraction. I posted a picture of a toy elephant head and a Brannock Device this month. < http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Miscellaneous/20170108_MR_Mine_DSF3901.jpg.html > When I was shooting it (on a 20 lb. tripod) I was trying to get everything in focus, but I had to settle for f/11. I could see a softening of detail on the focused point as I stopped down past f/8, especially at f/16 and f/32. The frame at f/11 was the best compromise between sharpness and D.o.F. FYI, the lens was a 35mm f/3.5 Perspective Control Nikkor. Ref: <http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/cirapp.html#c1> -- Alan Alan Magayne-Roshak, Senior Photographer University of Wisconsin-Milwaukee Photo Services (Retired) UPAA Photographer of the Year 1978 UPAA Master of the Profession 2014 amr3 at uwm.edu http://gallery.leica-users.org/v/Alan+Magayne-Roshak/ "All the technique in the world doesn't compensate for an inability to notice. " - Elliott Erwitt