Nikon MEP-30-60W Eyepiece For MonarchA 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