This Besler Beslar Lens Kit consists of a Beslar 50mm f/3.5 lens (No.8670), a standard lensboard (No.8021), to mount the lens, and a 35mm negative carrier (No.8053), all to fit the Besler 23C Series Enlargers.
A simple lens for enlarging 35mm-format film, the Beseler 50mm f/3.5 Enlarging Lens features a Leica M39/39mm threaded mount and includes a jam nut for mounting to lens boards for use. The optical design is comprised of coated and color-corrected glass for accurate results and the aperture ring features click stops for easier, more intuitive setting of aperture size when working in a darkroom.
This Negative Carrier is a 35mm round sandwich glassless rotating type film holder made for the Beseler 23C series enlargers.
This 39mm Lensboard is compatible with Beseler 23C, 45, and 810-series enlargers, and has a counterbore on the face of the board, making it ideally suited for 50-60mm focal length lenses when enlarging film. It also incorporates a red light pipe for illuminating the lens' aperture scale and is drilled to accept standard 39mm/M39-mount lenses.