When I use it with the bag bellow, I can get a good view of the image. But there is not enough magnification. I still get the black cloth and the loupe.
Printable View
These never worked for me. Magnification is too low, needs to be used with a bag bellows and awkward in many ways. These originally sold with a goggle attachment with an elastic strap. The idea was to wear this contraption like a goggle allowing the user to connect to the bag bellows on the back of the camera-ground glass to view instead of using a dark cloth. The plastic magnifiers flip up and out of the "way" for non-magnified viewing.
The other Sinar alternative viewing contraption was their reflex viewer with the mirror. This did not work that well either.
These alternative viewing contraptions were offered as alternatives to tried and true tested dark cloth with magnifier which simply works in the best way when used properly. Neither appeared to be big market success with users over time.
Bernice