Surplus shed mirror+cell, 114mm?
Posted 01 February 2013 - 12:15 PM
Question - at f7.8, will a spherical mirror be OK? SS says the don't know if they are parabolic or spherical, so I figure assume they are spherical...
They also have a 114mm morror at f4.4, but I am guessing that if it is spherical, that one will be ugly...
Posted 01 February 2013 - 12:26 PM
Posted 01 February 2013 - 01:17 PM
114mm diameter, 900mm focal length, sphere is about 1/5 wave error on the wavefront, so yes, it could be a good little mirror if it is smooth to the edge.
Posted 01 February 2013 - 06:55 PM
Posted 02 February 2013 - 09:25 PM
Price was good while it lasted.