At worst performer the 8x40 to my mind. When vistas overlap somehow the images, one gets the impression that one would squint. Focusing was only possible with great effort and sensitivity. It is very small, even a little too short for my taste, with big hands you do not really know what to do with all fingers. The large lenses are glued sloppy, everywhere you can see adhesive edges and the whole thing smells of plastic and rubber.
Similarly, the 10x50, which is significantly larger. Overcuts here has almost nothing, but to focus it could be not practical. One eye has always been kind of out of focus. Here we also saw clearly the edges of the visual field towards a white veil. Unpleasant smell did ours, as poor adhesion of the lenses. The first time you adjust the right lens, I had all the same part in hand, unfortunately you do not know then, of course, as the position was just and how to set up the part again.
In this series, the best was the 7x35. It was possible to make reasonably sharp, but also had at the edges again this white veil. Also, the picture arched towards the viewer and the glass smelled just as uncomfortable as the previous two. It is, however, in terms of size in the best hands and is pleasantly light. Here I wrestled with myself, I should keep it for a mere 34 euros? A glass with which I am not really happy, but also a glass which I'll use very rare and correspondingly low, it was supposed to be. I've ultimately decided against it, because you should have in rare use of pleasure to an object, otherwise annoys you every time you use. So also this glass goes back.
All three lenses have to readjust often to get a reasonably sharp image, even if the distances of the targeted points among themselves are not great. I do not know to what extent this is normal, but with a Swarowski glass that I could test, that was not so, it was almost like a fixed focus, although it is definitely not been.
The cheap processing falls on all three.
All in all, I am now come to the conclusion that you can absolutely expect anything special in this price range. For my taste, not even something that reasonably meets my expectations, good reviews or not. "Adequate for the price" may be a criterion that is met, but means to me that I have to reach into his pocket deeper.