Calumet Caltar HR 150mm f/5.6

Calumet Caltar HR 150mm f/5.6 is the high-resolution Caltar 4×5 normal — Calumet-branded Rodenstock Apo-Sironar-S 150 OEM.

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: ~220mm at f/22 — covers 4×5 with generous movements
• Optical formula: Rodenstock Apo-Sironar-S OEM (high-MTF refined)
• Multi-coating standard

Use case + rendering

The 150 Caltar HR is the highest-MTF Caltar 4×5 normal — Rodenstock Apo-Sironar-S glass at the Caltar price. Visible MTF improvement over Caltar II at fine-detail subjects.

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 Apo-Sironar-S 150mm f/5.6 — Rodenstock equivalent
• Calumet Caltar II 150mm f/5.6 — Apo-Sironar-N OEM Caltar
• Calumet Caltar HR 180mm f/5.6 — longer HR sibling