MBO, I have a set of these and when collimated there a reasonable set of Binoculars for the price. They have a plastic body which keeps the weight down so if your reasonable strong you can hand hold for short periods , best to have a post or similar to rest on thou at 20x.
Even though there a triplet design I don't think there is any special ED type glass used. There is some colour fringing on brighter objects but less than some short focal ratio acro refractors or doublet binos of the same magnification during the day , but at night this is not a problem at all unless you aim for the moon then there is some fringe colour.
The main annoyance is it only takes a reasonable small bump and they loss collimation.
This is rectified by lifting the covering soft plastic armour on the left side near the eyepiece to access a small adjustment screw.(do a google to get instructions on this)
This screw tilts one prism to adjust the view so the images line up. This is a rudimentary design as the prism is held with some silicon and the screw puts pressure on the prism against the silicon. I carry a small screw driver in the case as this is a regular adjustment I find.
Beside that I do use them from time to time and they provide a bright image with no ghost reflections and the coatings are even and do a good job.
Mark
