Optical report - I ran it up to 50x per inch and it didn't even breathe hard. 100x, some slight color fringing noticeable but the image held together. The diagonal is a tad inferior - a tiny tad - to my RAO diagonal that came with my Tasco (curved back). The latter also vignettes a smidgen less.
How did the Japanese optical techs hit homerun after homerun? I know this is "only" a 50mm objective but it could not be more perfect. Same story for my RAO 90mm and 76mm. My Towa 60mm is also fantastic. Sooner or later I should come across a dog right? All of them outperform (not by much) my 90s vintage Meade 90mm f/11 - the latter of course is getting to the point where CA is a real problem.
Does anyone in classic land own a Monolux larger than 60mm?
Edited by deSitter, 12 January 2017 - 12:13 PM.