Hello dear friends,

after a long search, I have found a picture from the optical design of the Tasco 16T / Mizar CX-150 catadioptric-newton.
This draw I found in a japanese forum :

As I emntioned before : if you remove the barlow-element, you get a fast 150/730 mm newton with razorsharp images !!

Because of the bad weather here, I had only the chance to take a short look at moon yesterday morning. I had very crisp and high quality views, better than in my old Meade 127NT500 newton and better than in my old TAL ( sovietzky ) 150/750 newton !!!
It seems to be an optical high quality barlow/corrector element and the parabolic main mirror seems to be of very good quality !!

CS Michael