This is a 80mm f4.0 lens most commonly used to make photographic prints with medium format negatives up to 6x6 cm in size. It is equipped with user conveniences such as an illuminated aperture scale, a preset iris lever and aperture click stops with click stop override. This model has 39mm LEICA mounting threads.
The Schneider Componon-S lenses are recognized industry-wide as a top-performing range of professional enlarging lenses. They are 6-element, 4-group lenses with special optical glass that are superbly corrected for a flat field, high-contrast transfer, and excellent definition over the whole field. With their high level of color correction, they are also ideal for top-quality color enlargements in enlargers using either opal lamps or cold-cathode lighting. The high performance of the Componon-S is maintained even at high magnifications and in distortion control setups.
Mechanically, the Componon-S lenses are specially matched to enlarging requirements. The aperture ring with a linear f-stop scale -- for focal lengths 135mm to 210mm with illuminated iris scale -- has click stops at full and half steps.
Componon-S lenses of 50mm to 100mm focal lengths are fitted in a new barrel mount with a luminous aperture scale, click stops which can be disengaged, and a preset aperture control. With this system the iris can be opened after stopping down to the desired aperture for final cropping adjustment or fine focusing. A lever then returns the iris to the previously selected working aperture shown on the luminous scale.
The Schneider Componon-S range of top-level enlarging lenses superbly meets all optical requirements of professional enlarging.