What are the alternatives to the leica super elmar m 18mm f 3 8 asph?

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From Leica Super-Elmar-M 18mm f/3.8 ASPH: Leica Super-Elmar-M 18mm f/3.8 ASPH: A prime lens by Leica for Full frame cameras, 18mm f/3.8. Specs - Maker: Leica - Focal length: 18mm (prime) - Maximum aperture: f/3.8 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 18mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Leica Super-Elmar-M 21mm f/3.4 ASPH: Leica Super-Elmar-M 21mm f/3.4 ASPH: A prime lens by Leica for Full frame cameras, 21mm f/3.4. A small 21mm; needs an external finder, live view or an EVF.

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