Howie Glatter Flug 2" Barlow Element to convert your Laser Collimator to a Barlowed Laser Collimator for Truss Tube Dobsonians with 2" Feathertouch Focuser.
The Artesky 650nm laser collimator is crafted from brushed aluminum with a precisely calculated diameter of 2" (50.8mm), fitting perfectly into your focuser! The projected laser beam, certified with a wavelength of 650nm, is very thin and well-defined so you can perform collimation both at night and during the day.