Calumet Caltar HR 90mm f/5.6

Calumet Caltar HR 90mm f/5.6 is the high-resolution Caltar wide LF lens — Calumet-branded Rodenstock Apo-Sironar-N or Apo-Sironar-S equivalent at 90mm.

Key features

• Mount: Copal 0 shutter (1s to 1/500, X-sync at all speeds)
• Focal length: 90mm
• Maximum aperture: f/5.6
• Image circle: ~250mm at f/22 — covers 4×5 with very generous movements; covers 5×7
• Optical formula: Rodenstock Apo-Sironar-N OEM
• Multi-coating standard

Use case + rendering

The 90 Caltar HR is the architectural wide 4×5 Calumet — Rodenstock-grade glass at lower cost than Rodenstock-branded equivalent.

Compatible cameras

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

Related lenses

• Rodenstock Grandagon-N 90mm f/4.5 — Rodenstock equivalent
• Calumet Caltar II 90mm f/6.8 — slower Caltar II sibling