Newport MKS Optical Filter Holder, Drop-in, 50.8 mm Optics FH-2S

The FH-2S Filter Holder is designed to securely mount 2.0 inch (50.8mm) round or square filters in a three-sided, spring-loaded, v-groove clamp and still allow for quick and easy interchange of the optic. Simply squeeze on the lower portion of the spring-loaded Delrin arm and insert the filter. When the arm is released, the filter will be held firmly in place. The FH-2S Filter Holder incorporates a counter bored clearance hole in its base, compatible with both 8-32 and M4 screws, allowing for post mounting on English and Metric SP and MSP Series Posts, as well as PS Series Pedestal Posts. And, like the FH-R Series, the FH-2S has two sets of threaded and clearance holes on the face of its base for use in stacking.