Astragon 210mm f/4.5

Astragon 210mm f/4.5 is a generic / regional brand 4×5 portrait-tele LF lens at 210mm — at very bright f/4.5 aperture, exceptional for an LF lens at this focal length.

Key features

• Mount: Copal 1 shutter (1s to 1/400, X-sync at all speeds)
• Focal length: 210mm
• Maximum aperture: f/4.5 (notably bright for the focal length)
• Image circle: ~250mm at f/22 — covers 4×5 with movements; covers 5×7 tightly
• Optical formula: Likely double-Gauss or fast plasmat
• Multi-coating typical

Use case + rendering

The 210 Astragon f/4.5 is the brightest LF 210mm available — unusual fast aperture suggests double-Gauss or fast-plasmat formula. Bright ground-glass focusing for difficult lighting conditions.

Compatible cameras

• Toyo 45A / Toyo 45AII / Toyo 45G
• Cambo SC / Cambo Calumet 45NX
• Graflex Speed Graphic / Graflex Super Graphic
• 5×7 view cameras

Related lenses

• Astragon 135mm f/4.5 — wider Astragon sibling