2 inch (M48) Filter Ring with Retainer
This is an empty filter ring in the 2" or M48 standard size that
will hold 1.850" (47mm) diameter round glass up to 1/8" thick.
The retainer ring threads in to hold the glass. Black anodized
aluminum, outside diameter is ~1.996". The male threads are
2.6mm deep, female threads are 6mm deep, overall height is
The ring has male threads on one side and female on the other,
so it can be used as a 0.3" spacer. It can also be used as a
99.9999% transmission, zero reflection, extremely wide band
Prices include shipping in the USA!