Fujinon AS 180mm f/9

Fujinon AS 180mm f/9 is the Apochromatic Super process / macro lens at 180mm — refined version of the A series with improved correction and image-circle specifications.

Key features

• Mount: Copal 0 shutter (1s to 1/500, X-sync at all speeds)
• Focal length: 180mm
• Maximum aperture: f/9
• Image circle: ~252mm at infinity; ~340mm at 1:1
• Optical formula: Apochromatic Super dialyte
• Coating varies by production year
• Process / macro optimization

Use case + rendering

The 180 AS is the refined apochromatic process / macro variant of the A 180. Performance comparable to A 180; the AS designation indicates a production-year refinement rather than a fundamentally different design.

Compatible cameras

• Toyo 45A / Toyo 45AII / Toyo 45G — extension rails recommended
• Cambo SC / Cambo Calumet 45NX — extension rails strongly recommended

Related lenses

• Fujinon A 180mm f/9 — A series sibling
• Fujinon AS 300mm f/9 — longer AS sibling
• Schneider G-Claron 210mm f/9 — Schneider equivalent (closest match)