Surprised by the extraordinary quality of this telescope view - great finesse and precision, sensitivity up to a maximum power of 60 there is little difference in exit pupil that is no blur as grosissement by 20 60 but at a distance of 50M .... birding - I suggest that long for people doing the shooting. Excellent purchase and without regret in relation to another that I own the "Celestron mk70" that has nothing to do with this BERGER + SCHROTER - Value for money EXCELLENT ...... The product is sold without any marks or precision reference on the room!