[Satchmo]

The 1/12 wave RMS surface accuracy they claimed on the 16" works out to around 0.66 ( 2/3 ) wave P-V wavefront accuracy which is around what the three 16" GSO mirrors I tested came out to. Not bad for a fairly thick ( 1.75" ) mass produced plate glass / BK7 that would be fairly hard to figure with any more accuracy .

It is simply 'wave inflation' to put specs in such a way that the average person will of course just lock eyes onto the 1/12 or 1/16 wave ....its an obvious marketing strategy that has been around for 50 years -. People will always want to believe that they can get everything for nothing. Most of these mirrors will never get debonded from their cells , make it back to a coater for recoating when the coating fails in a few years , to get a quality coating that might cost them $600 .

That being said a complete 16" scope is outstanding value if you're expectations are realistic for what you are getting . These results applied to the 16" that I looked at . The 10" and 12" I have seen in the field have been somewhat better.