Surprising quality for the price, good brightness due to the anti-reflection coating of the front lens and probably a minimum internal diaphragm made possible by the good quality of the lens (where a two lenses?), Pushed vignetting at the edges field demonstrating the accuracy of alignment of the lenses together and quality size thereof, nice precision for the use of the slide. Ideal for my child who discovers the Moon and nature with something other than a plastic toy. To observe the tiny confetti Venus and Jupiter, the x30 would be more appropriate, but necessarily less bright and more moved for a person accustomed to not properly hold an optical instrument. In addition, the minimum distance up to the point ~ 6m x20 would be further delayed, which would disappoint the child who wants to see the bird on the tree face.Donc, choose according to the use. That is why there are two models. I'd be curious to know what could be derived from the instrument to maximum reasonable x50 magnification corresponding to the diameter in mm of the lens). Would he make a good deal with a telescope ten times + expensive (but inverse image "thanks" to a less lens)? Comes with its protective sheath, with all remaining lightweight for ballads. The downside for delivery "with carrier" you've got to be there, and if you do not take the initiative to call to arrange an RV, the package restarts without you erriez known nothing: no notice in the box ... But the article itself is worth 5 stars.
