ND Filter Rotator, 1.0 in. Hub, θXθY, Micrometer

The 946-M Variable Neutral Density Filter Mount provides rotation as well as pitch/yaw adjustment for circular variable neutral density filters having a 1.0-in (25.4-mm) ID. SM-13 Micrometers provide angular adjustment of ±4° about each of two orthogonal axes to control the direction of the reflected beam from the face of the filter. An integrated pointer on the mount indicates the setting of the graduated scale on the attenuator.