The Leica Elmarit-M 21mm f/2.8 ASPH is a wide-angle prime for the Leica M rangefinder bayonet mount, introduced in 1997 and still catalogued at the time of Laney's second edition. It uses 9 elements in 7 groups with a single aspherical surface, three highly refractive elements and two of partial anomalous dispersion, and was built as a more compact replacement for the earlier non-aspherical Elmarit-M 21mm f/2.8. Because the M viewfinder does not cover 21mm, Leica listed a dedicated bright-line finder, catalogue number 12008, alongside it.

No UK auction records are attached to this page, so no hammer price, median or value range can be quoted here without inventing figures. As of 2026 the sensible approach is to judge what a copy is worth against saleroom results for comparable late M-mount wide-angles as they appear, remembering that UK auction results are wholesale hammer levels rather than what a lens sells for in a dealer window. Where variant premiums exist they usually track finish and completeness: the black 11135 was the only version until the silver-chrome 11897 arrived in 1998, and the scarcer chrome finish plus the matching 12008 finder can carry a price above a plain black body-only example.