Howie Glatter Single 532nm Green Beam Laser Collimator - 1.25"/2"

This 532nm Green collimator version is much brighter than the red ones (632nm or 650nm).

In most circumstances it is overly bright for night time collimation, but it is useful for Barlowed or holographic collimation in daylight or higher levels of ambient light.

Aligned to within 15 arc-seconds

Laser Colimating Instructions