a telescope is cheap so I was not expecting to have a great product c "was just to see the moon and another to show it to my children! the perspective is at the price, so I have nothing to reproach for optics, by cons tightening is abominable, as soon as an object edge and want to touch the clamping screw to lock the telescope the screws are shaking everything and the image is lost, it is simply impossible to keep a picture in the viewfinder This is very unfortunate because some seriously simple clamping system with screws which block the frame just have made the product usable and have enough to make a good product perfectly acceptable for the price