The Rodenstock 28mm F/4 Rodagon Enlarging Lens offers brilliant reproduction over a wide range of enlargement ratios.The Rodenstock 28mm F/4 Rodagon Enlarging Lens comes with six-element design and astigmatism correctionThe superior quality Rodenstock 28mm enlarging lenses are capable of providing resolution of the finest details while maintaining a uniformly high contrast on axis to field edgeThe magnification range of these Rodenstock lenses is 5x to 30x