Archived posting to the Leica Users Group, 2007/01/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Mark, Not so sure. Leica's data shows a lot of vignetting at f5.6. Len On Jan 15, 2007, at 8:56 PM, Mark Rabiner wrote: > 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/ > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information