Details
For those who already own a laser and a 2" barlow, a 2" mask may be threaded onto the front of your barlow. The mask provides an exit aperture for the laser beam to exit, for collimation purposes, but provides a flat surface to collimate the reflection of the gummed paper ring from your primary mirror against.
Additional Information
| Model | 2-BLM |
|---|---|
| Weight | 1.0000 |
