Rodenstock's medium/large format enlarging — the Rodagon 105mm for 4x5 printing.
The Rodenstock Rodagon is the company's professional-grade enlarging lens range, widely used in commercial and fine-art darkrooms worldwide. The 105mm f/5.6 is optimised for medium format negatives from 6×6cm to 6×9cm, using Rodenstock's proprietary multi-coating and a six-element formula for excellent sharpness and colour fidelity.
105mm focal length, f/5.6 maximum aperture, Rodenstock multi-coated, six-element design, M39 thread mount.
The Rodagon 105mm is a standard professional choice for medium format darkroom printing, competing directly with the Nikon EL Nikkor 105mm f/5.6 N and Schneider Componon 100mm. Sharpness is excellent at f/8–f/11. Less common than the 50mm Rodagon on the second-hand market.
Inspect for fungus, haze, and coating condition. Rodenstock coatings appear blue-green under reflected light; discolouration may indicate damage. Aperture blades should be oil-free. Check M39 thread.