Finally in Florida have had a chance to compare my small refractors for optical performance mainly using Jupiter as the target. First report many days ago was evaluating my Unitron 60mm model 28. I found it to exceed my expectations on sharpness, and contrast. I consider it the best 60mm I've experienced. Next was my 75mm Unitron. For sure an improvement due to brightness and higher magnification. As always I found it performs as one would expect.
Tonight I mounted my Tasco 10K 80mm F15 on my Unitron mount...I'm comparing optics not mounts. The truth is the Tasco has a replacement Carton lens from Sheldon. Well....It's a performer on planets. It hasn't star tested as well as my 75mm Unitron. But it gave my best views of Jupiter and Saturn this season so far. The funny thing is I want to let some scopes go. I recently offered the Tasco for $100 with it's humble mount included. Had a potential local buyer. But he asked how it star tested. I told him it wasn't as good as my Unitron and seemed less than perfect but very good. He balked and said it must not a have a Carlton lens...BS... Shelton assured me this lens was a Carlton and tested very good. So I've offered a real performer for $100 with it's feeble mount but no takers so far. In my opinion this could be a great "cheap" out reach scope...Maybe I'll just give it away.