At first glance this was seems like a well constructed solid piece of equipment.
With Barlow's an element of dimming is to be expected. I had hoped to use this to my advantage with very bright planets
However, the use of this Barlow made everything so dim I first had to double-check I took the cap off?
I pointed my scope directly at super-bright Jupiter (using 23mm Celestron 2" eyepiece and Barlow) and it was just a brown smudge when in focus. Tried viewing Saturn also, using 1,25 and 2" eyepieces with the barlow. You can make out the planet and rings, but every piece of detail is so dim as to be completely lost.