to obtain perfect grooves, in accordance with the lens shape, on central or front faces - groove depth ~0,7mm - width 0,5mm or, on request 1,10mm - lens thickness and 1,5/11.0mm Ø28/70mm - 2,7Kg [Full description below...]
Description
to obtain perfect grooves, in accordance with the lens shape, on central or front faces - groove depth ~0,7mm - width 0,5mm or, on request 1,10mm - lens thickness and 1,5/11.0mm Ø28/70mm - 2,7Kg