Leica M Mount to u4/3 adapter, LTM to M Mount. Nikkor-SC 5cm F1.4 in LTM on the EP2 - Mu-43 Gallery The Nikkor-SC 5cm F1.4 was introduced in 1950, in S-Mount and Leica Mount. I have one in LTM, a number in S-Mount. The lens underwent some tweeking at about the time the S2 was being developed. This is an early one, before the diameter of the optics was increased. The Bokeh is a bit smoother with it than the later ones. A great portrait lens, and will focus to 18". It is a small lens, quite heavy being all-brass construction. I'll take some snaps OF the lens on the EP2. It will be there for a while.