Rodenstock Sironar 300mm f/5.6

Rodenstock Sironar 300mm f/5.6 is the classic Rodenstock 8×10 normal plasmat — original Sironar at the standard 8×10 normal focal length.

Key features

• Mount: Copal 3 shutter (1s to 1/125, X-sync at all speeds)
• Focal length: 300mm
• Maximum aperture: f/5.6
• Image circle: ~420mm at f/22 — covers 8×10 with movements; covers 11×14 tightly
• Optical formula: 6-element/4-group plasmat
• Single-coated older; multi-coated later
• Heavy — Copal 3

Use case + rendering

The 300 Sironar is the classic 8×10 universal normal — long-running production. The lens that defines "300mm" on 8×10 for many older Rodenstock-system 8×10 photographers.

Compatible cameras

• 8×10 view cameras with Copal 3 lens-board capacity
• 4×5 view cameras can mount this lens for long-tele use

Related lenses

• Rodenstock Sironar 360mm f/6.8 — longer Sironar
• Rodenstock Apo-Sironar-N 300mm f/5.6 — apochromatic successor
• Schneider Symmar 300mm f/5.6 — Schneider equivalent