Meyer Gorlitz Vintage Trioplan 75mm Lens Modified To M42. This lens is very old and was modified to M42 with a 3D printed heliocoid from a lens crafter in Germany. It can be used on just about any camera system with proper adapter. I may have one I can include depending on what mount you need. But can def be used with Sony, Canon, Lumix, Nikon, Fuji, etc. lens is in great shape. These trioplans especially in 75mm are difficult to find, especially in usually condition and easily mountable to modern cameras. No aperture, shoots wide open only