Orion 8941 42mm DeepView Eyepiece This 42mm 2" telescope eyepiece offers bright, sharp and pleasing images of deep-space objects Eyepiece's 3-element lens design with multi-coatings ensures efficient light transmission for clear, vivid views Eye relief is a long 20mm, particularly attractive to eyeglass wearers Views through the 42mm DeepView eyepiece are delightfully free of pincushion distortion and chromatic aberration Threaded for use with 2" eyepiece filters