Copal lens shutters
All photographs © 2009 Jose Meneses – All rights reserved
Manufactured in Japan by the Copal Company LTD since 1946, Copal shutters are widely used on large format photography lenses. Full mechanical and very reliable lens shutters, they are quite repairable by many technicians all over the world.
Copal 0, Copal 1 and Copal 3 specifications
| COPAL LENS SHUTTER | 0 | 1 | 3 |
| Weight | 115gr | 160gr | 340gr |
| Outer diameter | 61mm | 73mm | 102mm |
| Lens mounting | Front: M 29.5mm x 0.5 Rear: M 29.5mm x 0.5 | Front: M 40mm x 0.75 Rear: M 36mm x 0.75 | Front: M 56mm x 0.75 Rear: M 56mm x 0.75 |
| Cable release nipple | M 3.2mm x 0.5 | M 3.2mm x 0.5 | M 3.2mm x 0.5 |
| Shutter speeds | T, B,1, 2, 4, 8, 15, 30, 60, 125, 250, 500 | T, B, 1, 2, 4, 8, 15, 30,60, 125, 250, 400 | T, B, 1, 2, 4, 8, 15, 30, 60, 125 |
| Shutter speeds tolerance | +- 30% | +- 30% | +- 30% |
| Maximum iris opening | 24mm | 30mm | 45mm |
| MInimum iris opening | 1.5mm | 2mm | 2mm |
| Number of iris blades | 5 | 7 | 7 |
| Synchronization | all shutter speeds | all shutter speeds | all shutter speeds |
| Max. sync delay times | before max. opening: 0.5ms after max. opening: 0.7ms | before max. opening: 0.5ms after max. opening: 0.7ms | before max. opening: 0.5ms after max. opening: 0.7ms |
| Threaded mounting ring | M 32.5mm x 0.5 | M 39mm x 0.75 | M 61mm x 0.75 |
