Rodenstock's premium large format standard — the Sironar-N 150mm for professional 4x5 work.
The Rodenstock Sironar N 150mm f/5.6 is the standard normal lens from Rodenstock's Sironar N line for 4x5-inch large format cameras. The Sironar N is Rodenstock's core large format lens series, providing excellent optical performance in a practical package for field and studio photography.
The lens provides 150mm at f/5.6 maximum aperture in a Copal 0 shutter, with Rodenstock's multi-coating (MC), a six-element double-Gauss derived formula optimised for infinity to moderate focus distances, and an image circle covering 4x5-inch with generous movement capability.
The Sironar N 150mm is one of the most commonly used normal lenses in 4x5-inch large format photography — it offers a balance of sharp performance, generous coverage for movements, and Rodenstock's reliability at a practical price. It competes directly with the Schneider Symmar-S and Nikon Nikkor-W in the standard normal lens category.
Test Copal 0 shutter timing and blade condition. Inspect Rodenstock MC coating integrity. Verify movement capability at the ground glass edges. Check element clarity for haze or coating deterioration. Rodenstock Sironar N in good condition is a reliable workhorse large format lens.