The Howie Glatter Barlow Laser Collimator Attachment diverges the beam just behind your barlow lens for accurate alignment. This allows the user to make solo adjustments.

The Collimator Attachment fits the threaded apertures of any of Glatter holographic collimators.

Disc attachment with a small mounted Barlow lens and flat white front surface screen.

• Attaches to laser aperture for making the primary mirror adjustment quick, efficient, and compact.

• Starlight Instruments Holographic Attachment - Self Barlowed