Leica's R-mount wide prime — 24mm f/2.8 ROM with electronic contacts.
The Leica Elmarit-R 24mm f/2.8 ROM is a wide-angle prime for the Leica R SLR system at Elmarit (f/2.8) aperture class. ROM indicates electronic coding for Leica R8 and R9 bodies. Leica R mount.
f/2.8 maximum aperture. 24mm focal length (full-frame). ROM electronic coupling (R8/R9 compatible). Manual focus via SLR viewfinder. At approximately 455g. 55mm filter thread. Leica R mount.
ROM coding provides electronic lens data to R8/R9 bodies. For adapted use on mirrorless systems, ROM vs non-ROM is irrelevant. The 24mm focal length is a classic wide-angle for landscape and architectural work — more compact and tractable than the 19mm. Leica R lenses are used on Sony FE and L-Mount via adapters for their optical quality.
On the used market the Leica Elmarit-R 24mm f/2.8 ROM is a premium wide-angle prime. Condition checks: 55mm front element, ROM contacts, aperture blade operation, focus ring smoothness. Leica R mount — requires adapter for current cameras.