| Dimensions | 178 mm |
|---|---|
| Focal Length (mm) | |
| Max Aperture (f) | |
| Aperture Blades | |
| Production |
Perken Son & Rayment Rapid Grossar 178/5.75
Early brass-body enlarger lens made in Hatton Garden, London. Five focal lengths exist, from 5-inch to 10.5 inch. Marked ‘Optimus’.




















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