Manufacturer's description:
Schneider COMPONON-S enlarging lenses meet or exceed the resolving power of most camera lenses. The six-element, four group design reproduces the finest details with a fair balance of contrast and sharpness. For all intent and purpose, chromatic aberrations have been eliminated. The COMPONON-S is the first choice when image quality can not be compromised. It is a versatile design and may be used to make enlargements in the 2x to 20 magnification range.
The COMPONON-S 50mm, 80mm and 100mm lenses, are mounted in a (BLV-L) Leica mount barrel that features an illuminated aperture, a pre-set aperture to check focus, and a clickstop override for precise expose control.
Specification:
Minimum aperture: f/22
Half-stop aperture settings
Illuminated aperture settings
Thread size: M39
Elements 6