Quote:
Originally Posted by glend
Sharpstar (The Brand) are manufactured by Kumming United Optics, who also make many of the Teleskop-express (TS) branded scopes. In fact you can find the 121SDQ model on the Teleskop-Express website. Details here:
https://www.teleskop-express.de/shop...field-Apo.html
I note that Teleskop-Express mention the glass is FPL53 from Japan, and they have a pretty solid reputation for truth in advertising. They also include a Spot diagram on the web pages related to this scope.
As a personal aside, having owned a couple of TS APO scopes, the TS130 is imho a much better buy, and significantly cheaper, with more flexibility as a platform. It is an f7 Triplet but can be easily reduced to f5,5 with that standard TS 3" reducer corrector, and you get 9mm more aperture. |
I am sure that TS optics operates in good faith and they wrote what the manufacturer said.
The TS130 is a triplet, not a Petzeval quintuplet so you need to add a flattener. Also the TS optics is f/7 and not f/5.6.