Clear glass, ground edges.
In Stock
Metal holder with sides grooved to hold lens up to 50 mm diameter on wooden support.
Wooden, with V shaped slot to take spherical lens or mirror up to 75 mm diameter, with index mark.
Optically worked, back silvered, with protective coating.
Moulded glass, all sides polished.
With 6 mm diameter Metal rod, to fit into standard optical bench mounts and stands.