Kodak Commercial Ektar 305mm f/6.3

Kodak Commercial Ektar 305mm f/6.3 is the historic Kodak 8×10 normal commercial Tessar at 305mm (~12 inches) — Copal 3 mounted version.

Key features

• Mount: Copal 3 shutter (1s to 1/125, X-sync at all speeds)
• Focal length: 305mm
• Maximum aperture: f/6.3
• Image circle: ~430mm at f/22 — covers 8×10 with movements; covers 11×14 tightly
• Optical formula: 4-element Tessar (Commercial Ektar)
• Single-coated
• Heavy — Copal 3

Use case + rendering

The 305 Commercial Ektar is the historic Kodak 8×10 normal at slightly longer focal length than the 254 sibling. Available in Copal 3 mount makes it more practical than barrel-mount alternatives.

Compatible cameras

• 8×10 + 11×14 view cameras with Copal 3 lens-board capacity

Related lenses

• Kodak Commercial Ektar 254mm f/6.3 — wider Commercial Ektar
• Kodak Commercial Ektar 355mm f/6.3 — longer Commercial Ektar