Archived posting to the Leica Users Group, 2017/01/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Just of note: Capture 1 now has diffraction correction in its raw processor. I haven't tried it yet... but it seems to be worth investigating... Bob Adler Robert Adler Photography www.robertadlerphotography.com > On Jan 26, 2017, at 5:54 PM, Alan Magayne-Roshak <amr3 at uwmalumni.com> > wrote: > > 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 > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information