Rodenstock Sironar-S 150mm f/5.6

Rodenstock Sironar-S 150mm f/5.6 is the refined Rodenstock 4×5 normal plasmat — the "S" denoting improved coatings and updated formula vs the original Sironar. Bridge between original Sironar and Apo-Sironar lineages.

Key features

• Mount: Copal 0 shutter (1s to 1/500, X-sync at all speeds)
• Focal length: 150mm
• Maximum aperture: f/5.6
• Image circle: ~210mm at f/22 — covers 4×5 with generous movements
• Optical formula: 6-element/4-group plasmat (refined from Sironar)
• Multi-coating standard

Use case + rendering

The 150 Sironar-S is the next-generation 4×5 normal — multi-coating gives noticeably better contrast against backlit subjects vs older single-coated Sironar.

Compatible cameras

• Toyo 45A / Toyo 45AII / Toyo 45G
• Cambo SC / Cambo Calumet 45NX
• Graflex Crown Graphic / Graflex Speed Graphic / Graflex Super Graphic

Related lenses

• Rodenstock Sironar 150mm f/5.6 — original Sironar
• Rodenstock Apo-Sironar-N 150mm f/5.6 — apochromatic successor