Starlight Instruments

Normally, a telescope takes parallel light rays from a distant star and converges them to a point at the eyepiece focus. Barlowed laser collimation takes advantage of the fact that a telescope will work in reverse. /... /

• Attaches to laser aperture for making the primary mirror adjustment quick, efficient and compact. 
• The Howie Glatter Barlow Laser Collimator Attachment diverges the beam just behind your barlow lens for accurate alignment. 
• Allows the user to make solo adjustments. 
• The Howie Glatter Barlow Laser Collimator Attachment fits the threaded aperture of any of Glatter holographic collimator. 
• Disc attachment with a small mounted barlow lens and flat white front surface screen.

SI-LC2125-532—Single GREEN Beam 2"/1.25" Laser Collimator

This end cap fits the 3.5" Feather Touch focusers and allows the adaption of 2" accessories to this focuser.

• Eyepiece connection: 2" with compression ring and 3 machined thumb screws
• Focuser connection: female thread - fits the big male thread of the FTF35XX focuser