Leica's full-frame R fisheye — the manual-focus Fisheye-Elmarit-R 16mm f/2.8 with curvilinear rendering.
The Leica Fisheye-Elmarit-R 16mm f/2.8 is a full-frame fisheye prime for the Leica R reflex system. It gave R users a curvilinear ultra-wide option distinct from the rectilinear Super-Angulon and Elmarit wides, producing the characteristic bulging fisheye rendering across the full 35mm frame. It was a specialist lens produced in relatively small numbers over the life of the R line.
This is a manual-focus Leica R lens with a 16mm focal length and a maximum aperture of f/2.8. As a full-frame fisheye it delivers an approximately 180-degree diagonal field of view with deliberate barrel distortion rather than corrected straight lines. Because the front element is strongly curved and protruding, it uses a built-in or rear filter arrangement rather than conventional front screw filters; confirm the exact filter setup for the specific example.
The fisheye look bends any line not passing through the frame centre, which can be used creatively for dramatic curved horizons, tight interiors and close foreground subjects. Depth of field is very large, so most of the scene stays sharp. It suits photographers who want the strong wraparound perspective effect rather than a corrected wide-angle view.
On the used market the Fisheye-Elmarit-R is uncommon and priced accordingly. Inspect the exposed front element carefully for scratches and coating wear, check the built-in filter mechanism operates cleanly, and look for haze or fungus inside. Confirm the cam configuration for correct metering on your R body, and note that the protruding element demands careful handling and storage.