The focal length of the collimator is 766.1mm (30.16inches). The Pyrex mirror is figured as a 10o off-axis paraboloid, with a point-source beam diameter of 101.6mm (4.0inches).
Source URL (modified on 09/30/2011 - 17:08): http://www.ctio.noao.edu/noao/content/15mRC-Collimator
