Equipment

Howie Glatter Blug™

21 November 2015 Steve Ringwood

In order for a telescope to perform to theoretical limits its optical components must be perfectly aligned. With an optically fast Newtonian reflector this can be a challenge, but a laser collimator makes the task much easier. Steve Ringwood investigates Howie Glatter’s Blug™ — a charming contraction of ‘Barlowed collimation plug’.