Archived posting to the Leica Users Group, 2007/01/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The shots I posted have no cropping at all. Your slide mount itself crops a little. Also I don't know if b&w negatives make a difference. Yup. That new 28mm asph Elmarit is a beauty. I saw it at my local shop. I think he only got one in and it was gone in two days. The lens is really tiny. And cheaper than a mint, used non-asph. Hard to believe. Cheers, Len On Jan 15, 2007, at 9:45 PM, G Hopkinson wrote: > Len thanks for posting some stuff so promptly. It's very enjoyable > to be discussing actual Leica photographs on the LUG! I agree > that the effect seems more apparent in your examples, perhaps, than > mine. Mine too would have been at moderate apertures. I may have > been misleading discussing the wide open performance. I think what > we are looking at is a sky polarisation effect rather than true > vignetting. It may be exacerbated by conversion to the digital > versions that we are all looking at. I notice this with conversion to > black and white particularly with significant tonal adjustments. > Another factor may be where we have cropped with the different > shots. For my images, I crop to A4 proportions. That typically > discards the extreme outside edges of the original 24 x36mm frame > (where some of the effect resides). Look carefully at the bottom > corners of Img145 from your son's examples. > <http://gallery.leica-users.org/v/LeonardT/28mm/Img145.jpg.html> > I don't see any effect in the bottom corners. It's not apparent in > shots where the bottom corners are very dark, of course. That > might square with my polarisation theory. > > When I look carefully, on a light box at my Velvia originals, the > effect is much less apparent, as well. > > Herr Puts describes the 2 28 asph as having marginally higher fall > off than the Elmarit and the new 2.8 28 asph sounds very > interesting indeed, doesn't it? > I think that the current 28 is an absolute triumph of design and a > lens that I really enjoy using. > > Cheers > Hoppy > > -----Original Message----- > From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org > [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On > Behalf Of > Leonard Taupier > Sent: Tuesday, 16 January 2007 12:08 > To: Leica Users Group > Subject: Re: [Leica] 28mm Summicron vignetting > > 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 > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information