Rodenstock Sironar 240mm f/5.6
Rodenstock Sironar 240mm f/5.6 is the classic Rodenstock 5×7 + 8×10 normal-class plasmat — original Sironar at 240mm.
Key features
- Mount: Copal 1 shutter (1s to 1/400, X-sync at all speeds)
- Focal length: 240mm
- Maximum aperture: f/5.6
- Image circle: ~330mm at f/22 — covers 5×7 with generous movements; covers 8×10 tightly
- Optical formula: 6-element/4-group plasmat
- Single-coated older; multi-coated later
Use case + rendering
The 240 Sironar serves as portrait lens for 4×5, short-tele for 5×7, and normal for 8×10. Long-running production; widely available.
Compatible cameras
- Toyo 45A / Toyo 45AII / Toyo 45G
- Cambo SC / Cambo Calumet 45NX
- 5×7 + 8×10 view cameras
Related lenses
- Rodenstock Sironar 210mm f/5.6 — wider Sironar
- Rodenstock Sironar 300mm f/5.6 — longer Sironar
- Rodenstock Apo-Sironar-N 240mm f/5.6 — apochromatic successor
Notes
Specs: Michael Gudzinowicz, largeformatphotography.info