The Swarovski 20-60x zoom eyepiece is a great all-rounder. At the 20x setting you get a bright, wide field, ideal for low light use or scanning large areas of habitat. With a quick turn of the smooth zoom ring to the 60x setting you are at about the highest practical magnification for nature observation. The sharpness and field of view remain very impressive, but at the same time apparently bringing your subject much closer with glorious detail. The 17mm eye relief enables glasses wearers to comfortably see the full field of view.