... a reasonably-priced entry into the wide-angle eyepiece category. With a 60° wide field of view, they offer around 20% more field than standard Plössl eyepieces. With these eyepieces, the unpleasant tunnel effect is a thing of the past. Despite this, they are not much more expensive than simple Super Plössl eyepieces. But Cronus eyepieces offer even more: a comfortable viewing experience. Even at the smallest focal lengths, the eyepieces have a good 20mm diameter and an eye relief of 16 mm.