Archived posting to the Leica Users Group, 2007/01/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On 1/15/07 7:35 PM, "Leonard Taupier" <len-1@comcast.net> typed: > Here are a few examples of vignetting using the 28mm Summicron. These > were shot in b&w but the sky was crystal clear blue. These were shot > by my son at Zion, Bryce and the Grand canyon. > > <http://gallery.leica-users.org/v/LeonardT/28mm/Img138.jpg.html> > > <http://gallery.leica-users.org/v/LeonardT/28mm/Img145.jpg.html> > > <http://gallery.leica-users.org/v/LeonardT/28mm/Img225.jpg.html> > > <http://gallery.leica-users.org/v/LeonardT/28mm/Img136.jpg.html> > > I'm not sure of the f stop but I believe they were in the f5.6 to f8 > range. We ran a test in my backyard of the Summicron versus the > Elmarit (not asph). The Elmarit had a little less vignetting. All the > examples were easily fixed in Photoshop using the lens distortion > filter. > > Len > > > I don't think you're going to get vignetting at f5.6 to f8 with even the cheapest dumbest glass. I think this is sky polarization or digital stuff emphasized by extreme addition of contrast. Mark Rabiner New York, NY 40?47'59.79"N 73?57'32.37"W http://rabinergroup.com/