7 Artisans 50mm f1.8 for Micro Four Thirds  type_Film Cameras It has an M42 mount-

It has an M42 mount- a little bit unusual for an enlarger lens- but it otherwise pretty straightforward

A nice example of this lens

collapsing to not much more than a foot long

and calibrated to use longer-lasting 1

6II DG HSM is a full-frame ultrawide zoom lens for Minolta and Sony SLR cameras

7 Artisans 50mm f1.8 for Micro Four Thirds &nbsptype_Film Cameras It has an M42 mount-The 7 Artisans 50mm f1. 8 is a simple, lightweight manual focus prime lens for Micro Four Thirds cameras. Focusing action is smooth, which is nice; the aperture action has no click stops, which is either nice or not nice, depending on your preferences. Clean glass, good function.