Do classic achromats outperform modern APOs?Posted By Joe Bergeron |
First off, I don't think that particular scope is really a Unitron, since it doesn't have the original objective. Others might disagree if they feel that a Unitron is defined only by the mechanical parts, since they seem to have gotten their lenses from multiple sources.
The seller quotes impressive surface accuracy figures for the replacement lens. In that sense, it might be superior to a run-of-the-mill Chinese doublet "apo". Or maybe not.
I have observed with a purebred 4" Unitron, and was not very impressed.
The seller quotes impressive surface accuracy figures for the replacement lens. In that sense, it might be superior to a run-of-the-mill Chinese doublet "apo". Or maybe not.
I have observed with a purebred 4" Unitron, and was not very impressed.