Tach
Newbie
Just for s***s and giggles, I compared those two lenses. Results were a bit unexpected.
Methodology: I used a Leica M7 with a long cable release and a very stable large format wooden tripod, solidly spiked into my earthen yard on a windless day. Tripod was as down as a I could confortably focus the lenses.
Here we see it with a Summicron DR, as I repeated the test with all the 50 mm lenses in my collection.
I used high resolution microfilm Adotech CMS 20, developed in its propietary developer, and then scanned the negatives in my Pacific Image XAs at 5000 DPI, manually focusing each one. I focused on center on an USAF 1951 chart, at exactly 2750mm measured with a laser rangefinder.
Full image from where crops were taken:
The crops are from a 7117 x 4697 pixel image, at 2:1 magnification, so you're pixel peeping at the equivalent of a 48x32 print at 300DPI. Both negatives shot at f/2 after careful focusing.
Corner Crop.
Yup, as expected the 2010's cron murders the poor old 1946 summitar.
Close to center.
Whoa. What is that? Also notice 'leica glow' from the paper corner in the summitar.
Center.
Whoa.
As an aside, most 50mm lenses tested in microfilm outresolved the dedicated film scanner. To check final resolution I had to mount them in my enlarger, use a focotar II at optimum aperture cranked as high as I could and a 25x grain focuser, at total magnification of 325x.
Methodology: I used a Leica M7 with a long cable release and a very stable large format wooden tripod, solidly spiked into my earthen yard on a windless day. Tripod was as down as a I could confortably focus the lenses.
Here we see it with a Summicron DR, as I repeated the test with all the 50 mm lenses in my collection.
I used high resolution microfilm Adotech CMS 20, developed in its propietary developer, and then scanned the negatives in my Pacific Image XAs at 5000 DPI, manually focusing each one. I focused on center on an USAF 1951 chart, at exactly 2750mm measured with a laser rangefinder.
Full image from where crops were taken:
The crops are from a 7117 x 4697 pixel image, at 2:1 magnification, so you're pixel peeping at the equivalent of a 48x32 print at 300DPI. Both negatives shot at f/2 after careful focusing.
Corner Crop.
Yup, as expected the 2010's cron murders the poor old 1946 summitar.
Close to center.
Whoa. What is that? Also notice 'leica glow' from the paper corner in the summitar.
Center.
Whoa.
As an aside, most 50mm lenses tested in microfilm outresolved the dedicated film scanner. To check final resolution I had to mount them in my enlarger, use a focotar II at optimum aperture cranked as high as I could and a 25x grain focuser, at total magnification of 325x.
