|
HAd a Skywatcher Maksutov once - meniscus looked perfectly clean util you shone a light on it... then you could see things, INTERNAL.
Worst of all, SW in their brilliance had written in wax pencil or Chinagraph, a number (a batch number or assembly number) on the outside surface, which they obviously removed at final build, BUT it was DEFINITELY still visible under light, and was VERY hard to eliminate. VERY!!!
|