The first diamond lens made by Andrew Pritchard
- maker:
- Andrew Pritchard and Thomas Hugh Powell
The first diamond lens made by Andrew Pritchard (Plano-convex, 1/20 inch focus, aperture 1/20 inch mounted in this brass circular disc 1/4 inch diameter)
The first diamond lens made by Andrew Pritchard (Plano-convex, 1/20 inch focus, aperture 1/20 inch mounted in this brass circular disc 1/4 inch diameter)