The sky watcher esprit 100ed professional super apo triplet refractor ota are instruments of the highest quality with optical performance rivalling or exceeding similar telescopes of even the most famous high end telescope brands the esprit super apo triplets are designed for the most demanding astro imagers for use with the optional m48 field flattener not included but are also fine telescopes for visual observations the premium superbly corrected optical systems deliver high contrast im