Cool vintage lenses and Mamiya Sports Finder

Mamiya Press Sportsfinder 6X7 Format Our Price: $45.00		B&L 20mm Baltar Vintage Lens for Movie, Macro Work Or Digital Photos Our Price: $95.00		Zeiss 257mm F11 Lens Early Protar Design Our Price: $65.00
Features frames for both 100mm and 150mm lenses. Slides on camera top into standard accessory shoe. Viewing mask for 6X7 film format.		This is a high quality lens made by B&L for special purposes. The lens features an adjustable F stop ring from 2.3 to 16. The thread size on the back is 20mm, slightly larger than a D mount. The optics are coated. Recently we’ve seen one of these lenses mounted on a Micro 4/3 camera, which would be the equivalent of 40mm in 35mm format.		Typical of lens sets of this vintage (before WWI) the barrel is marked in millimeters rather than in F stops, so that other optics could be used  in the mount.