Leica's R-mount ultra-wide — 3-cam version of the 19mm f/2.8 without ROM contacts.
The Leica Elmarit-R 19mm f/2.8 (3-Cam) is an ultra-wide prime for the Leica R system at Elmarit (f/2.8) aperture class. The 3-Cam version adds the M-coupling cam alongside the standard 1-cam and 2-cam metering cams, enabling native use on Leica M bodies via the M-Adapter-R. Leica R mount.
f/2.8 maximum aperture. 19mm focal length (full-frame). 3-Cam coupling (Leicaflex SL, R3–R7, and Leica M bodies via M-Adapter-R). Manual focus via SLR viewfinder. At approximately 480g. 77mm filter thread. Leica R mount.
The 3-Cam designation is significant for Leica M body users: with the M-Adapter-R, a 3-Cam R lens meters correctly on M bodies (unlike 1-cam or 2-cam versions). For adapted use on modern mirrorless cameras, cam variant is irrelevant — only optical and mechanical condition matters.
On the used market the Leica Elmarit-R 19mm f/2.8 3-Cam is a premium ultra-wide prime. Condition checks: 77mm front element, all three cam contacts for wear, aperture blade operation. Leica R mount — requires adapter for current cameras. 3-Cam commands a premium for M-body users; irrelevant for mirrorless adapted use.