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And there are a few brand-specific provisos, as well. Nikon F-mount lenses need a small shim that sits on the rear of the lens' mount interface, ensuring adequate flange-back distance. (Two shims are included with the PK+MM Multi Mount kit, made from black Formex GK-10 polypropylene, an anti-fungal and electrically insulative material.) Olympus OM-mount lenses must have their aperture lever jammed at the open aperture position. Most invasive of the group are the Contax / Yashica lenses, which need a non-reversible modification to shorten the aperture lever by at least 3mm, so that it is possible to stop the aperture down. And for all mounts, you'll need to check that the rear element doesn't protrude beyond the metal mount flange, to prevent collision with the reflex mirror.
Entonces poco aporta y por lo que cuesta te compras un adaptador diferente para cada montura y aseguras el funcionamiento correcto.
. De hecho, en el vídeo hacia el minuto 5 podemos ver como monta y desmonta un konica hexanon; sobre todo al desmontarlo se puede ver que está poco menos que posado en la cámara.