Posts Made By: John Williams

I am interested in purching a 18" Starmaster with a Pegasus mirror. The seller sent me a copy of the mirror certificate. No where on the certificate does it show a strehl ratio. It has all the other #'s ie: surface and wavefront P-V error, surface RMS error and wavefront RMS also relative transverse aberration. Is there a way of calculating the Strehl ratio from these #'s. The purpose is for comparison purposes for other Starmasters that are available to me for sale. Any help is greatly appreciated.

Excuse me that Transverse aberration # is 0.5322

David,

Are you bringing your new toy to Mid- Atlantic Star Party.