I picked this lens up a few months ago for $400 off ebay- had some internal Haze. I got some tips for disassembly on Leicaplace, was able to get to the inner surfaces with the issues. The glass cleaned up nicely. This is an uncoated lens, 7 elements in 5 groups. After using it on the M Monochrom and M9- I’m impressed. More flare that the Summarit, not quite as sharp wide-open as a contemporary Sonnar. which i also brought along,
Wide-Open, Series VI orange filter in use.
I believe the shape of the aperture of this lens is to minimize focus shift.
wide-open on the M9, ISO 2500.
I will be writing an article comparing the Xenon and the uncoated/pre-war Sonnar 5cm F1.5 on the M9 and M Monochrom.
“Super-Speed Shoot-out, 1930s style”
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