Paterson's basic enlarging lens — the 50mm for budget 35mm darkroom work.
Paterson is a British darkroom equipment brand best known for its developing tanks and accessories. Their 50mm f/3.5 enlarging lens was marketed as an affordable option for amateur darkroom users, offering M39 thread compatibility and basic anti-reflection coatings for black-and-white and colour printing.
50mm focal length, f/3.5 maximum aperture, basic anti-reflection coated, M39 thread mount, designed for 35mm negatives.
The Paterson lens is an entry-level offering suitable for casual darkroom work. Optical quality is adequate for standard print sizes but does not compete with Nikon EL Nikkor, Rodenstock Rodagon, or Schneider Componon at large enlargement ratios. Value lies in its low cost and M39 standard compatibility.
Inspect for haze and fungus; coatings on budget-grade enlarging lenses are sometimes thin single-layer and more susceptible to damage. Check aperture blades and M39 thread condition.