Fujinon T 400mm f/8

Fujinon T 400mm f/8 is the long telephoto LF design at 400mm — the longer T sibling, providing 400mm focal length on field cameras with limited bellows draw.

Key features

• Mount: Copal 1 shutter (1s to 1/400, X-sync at all speeds)
• Focal length: 400mm (effective; physical length shorter than 400mm)
• Maximum aperture: f/8
• Image circle: ~247mm at f/22 — covers 4×5 with movements; covers 5×7 tightly
• Optical formula: Telephoto (asymmetric)
• Single-coated older; multi-coated later

Use case + rendering

The 400 T is the portable 4×5 long-tele — useful for distant landscape isolation, architectural detail, and other compositions requiring long focal length on field cameras. The telephoto formula makes 400mm practical on cameras whose bellows wouldn't accommodate a hypothetical 400mm symmetric plasmat.

Compatible cameras

• Toyo 45A / Toyo 45AII / Toyo 45G — verify bellows draw
• Cambo SC / Cambo Calumet 45NX — extension rails likely needed
• Graflex Speed Graphic / Graflex Super Graphic

Related lenses

• Fujinon T 300mm f/8 — wider T sibling
• Fujinon T 600mm f/12 — longer T sibling
• Schneider Apo-Tele-Xenar HM 400mm f/5.6 — Schneider equivalent