Sky-Watcher's Emerald eyepieces have an 82° apparent field of view, wide enough to take in large star clusters, nebulae and the full lunar disc in one view. The range covers a 9mm in a 1.25" barrel and 16mm and 22mm models in 2" barrels, letting you step from low-power scanning to closer views of the Moon and planets. Compare other wide-field eyepieces or browse all eyepieces.