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amongst the variables of size, weight, price, eye relief and apparent field of view.  They're universally applauded by both amateur and professional astronomers alike, and hold their resale value incredibly well. The Plossl 32.0mm eyepiece is a venerable "entry level" classic amongst Tele Vue eyepieces.  It is characterized by having a supersharp, relatively narrow 50° apparent field of view with sufficient eye relief.  It is lightweight for its focal length and ideally suited for work in Tele Vue's Bino Vue Stereo Binocular Viewer.