Schneider G-Claron 240mm f/9

Schneider G-Claron 240mm f/9 is the process-lens / macro 5×7 + 8×10 dialyte — covers 5×7 generously and 8×10 tightly. Popular among 5×7 + 8×10 alternative-process photographers for contact-print workflows.

Key features

• Mount: Copal 1 shutter (1s to 1/400, X-sync at all speeds)
• Focal length: 240mm
• Maximum aperture: f/9
• Image circle: ~300mm at infinity; ~440mm at 1:1
• Optical formula: 6-element/4-group dialyte
• Single-coated
• Process-lens optimization

Use case + rendering

The 240 G-Claron is the 5×7 + 8×10 alternative-process normal — the lens of choice for many photographers making contact prints in cyanotype, palladium, salt, or albumen. Sharp + clean; the dialyte rendering complements the alt-process aesthetic.

Compatible cameras

• Toyo 45A / Toyo 45AII / Toyo 45G — usable as a 4×5 long-tele
• Cambo SC / Cambo Calumet 45NX
• 5×7 + 8×10 view cameras

Related lenses

• Schneider G-Claron 210mm f/9 — wider G-Claron sibling
• Schneider G-Claron 270mm f/9 — longer G-Claron sibling