Description

Optically worked, silvered back with protecting coating.

AVALIABLE IN TWO SIZE (50 & 75 MM)

TYPE               DIAMETER (MM)                F.L. (MM)

1.                           50                                            100
2.                           50                                            150
3.                           50                                            250
4.                           75                                            100
5.                           75                                            150
6.                           75                                            250