A wide field of view and high resolving power throughout the entire zoom range This zoom-type eyepiece with a zoom range from 30x to 60x* realizes ultra-high optical performance. With an advanced optical design, it corrects image distortions while maintaining a wide field of view over the whole zoom range. What&';s more, the sharp and clear images from edge to edge are equivalent to those of non-zoom eyepieces.*When attached to MONARCH Fieldscope 82 series. Magnification 30 -60x Weight 13.1 oz.13.1 g