Leica summaron m 28mm f 5 6 vs ttartisan m 28mm f 5 6?

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From Leica Summaron-M 28mm f/5.6: Leica Summaron-M 28mm f/5.6: A prime lens by Leica for Full frame cameras, 28mm f/5.6. A tiny remake of a 1950s lens, slow and with a vintage look. Specs - Maker: Leica - Focal length: 28mm (prime) - Maximum aperture: f/5.6 - 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, 28mm. Cameras it ...

From TTArtisan M 28mm f/5.6: TTArtisan M 28mm f/5.6: A prime lens by TTArtisan for Full frame cameras, 28mm f/5.6. A 19mm-thin pancake for zone-focused street photography. Specs - Maker: TTArtisan - Focal length: 28mm (prime) - Maximum aperture: f/5.6 - 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, 28mm. Cameras it fits - Leica M9: Full frame ...

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