Acuton 180mm f/4.8

Acuton 180mm f/4.8 is a generic / regional brand 4×5 portrait-tele LF lens at 180mm — at unusually bright f/4.8 aperture for an LF lens.

Key features

• Mount: Copal 1 shutter (1s to 1/400, X-sync at all speeds)
• Focal length: 180mm
• Maximum aperture: f/4.8 (notably bright for the focal length)
• Image circle: ~230mm at f/22 — covers 4×5 with movements
• Optical formula: Likely double-Gauss or symmetric (varies)
• Multi-coating typical

Use case + rendering

The 180 Acuton f/4.8 is the bright budget 4×5 portrait-tele — unusual fast aperture for an LF lens; bright ground-glass focusing.

Compatible cameras

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

Related lenses

• Acuton 150mm f/6.3 — wider Acuton sibling