Calumet Caltar S 135mm f/5.6

Calumet Caltar S 135mm f/5.6 is the Schneider-OEM Caltar 4×5 plasmat at 135mm — Caltar-S generation indicates Schneider Symmar / Apo-Symmar OEM glass.

Key features

• Mount: Copal 0 shutter (1s to 1/500, X-sync at all speeds)
• Focal length: 135mm
• Maximum aperture: f/5.6
• Image circle: ~188mm at f/22 — covers 4×5 with movements
• Optical formula: Schneider Symmar / Apo-Symmar OEM
• Single-coated older; multi-coated later

Use case + rendering

The 135 Caltar S is the older-generation Caltar wide-of-normal — Schneider-derived glass at the Caltar price. Less common than later Caltar II / HR variants.

Compatible cameras

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

Related lenses

• Schneider Symmar 135mm f/5.6 — Schneider equivalent
• Schneider Apo-Symmar 135mm f/5.6 — Schneider apochromatic