Mamiya-Sekor 50mm f4.5 for Mamiya RB67 brand_Robot Camera mounting screw is 1/4"-20

Camera mounting screw is 1/4"-20 threaded

The Panasonic G Vario 100-300mm f4-5

Glass has minor cleaning marks on front and rear elements but is otherwise clean and clear

NOTE: this is not for the manual-focus C/Y mount

Mamiya-Sekor 50mm f4.5 for Mamiya RB67 brand_Robot Camera mounting screw is 1/4"-20This Mamiya Sekor 50mm f4. 5 for Mamiya RB67 is in excellent cosmetic condition, with only minor paint and finish wear. There is a very light cleaning mark near the edge of the front element; the glass is otherwise clean and clear. Slightly stiff aperture and FLE rings, good diaphragm blades, accurate shutter speeds throughout range. Not perfect, but still an excellent (and fully functional) wide angle lens for the RB.