The extremely long 56 mm focal length provides views in long focal length telescopes that are perfect for viewing wide field objects or terrestrial daytime views The 4-element Plössl design provides sharp views to the edge of the 47° field of view.
Fully multi-coated for best light transmission through the lenses, resulting in brighter images Comfortable eye relief (52 mm) and flip-down rubber eye shield for comfortable viewing with or without glasses Knurled rubber grip for non-slip handling during observing sessions Threads for most 2" filters