Rs20-60x80 is a extremely high quality spotting scope. Optically, it compares well with much higher-prices scopes. The focussing is smooth, fast and accurate. The 45 degree eyepiece allows a more comfortable viewing position when looking at anything high above the horizon. For birding, the images are bright and sharp. It can be put to astronomical viewing. You can choose to use fully multi coated lens or imported Japan ed lens.