Rodenstock Rodagon 50mm f2.8 brand_Other or you're thinking of converting

or you're thinking of converting to a plate camera

not perfect

it's not half bad

Includes a Nikon HB-47 lens hood

The SMC Pentax-A 50mm f/2 is a compact standard lens for Pentax K-mount cameras

Rodenstock Rodagon 50mm f2.8 brand_Other or you're thinking of convertingThe Rodenstock Rodagon 50mm f2. 8 is a good quality enlarger lens for 35mm film. In excellent condition, with clean glass. Attaches to your enlarger lensboard with a standard 39mm thread mount. Includes original bubble case. Please note: This lens has a standard LTM (39mm) thread mount, but it is not designed to be mounted directly on LTM cameras. Don't buy this for your rangefinder, because it will not work at all.