E-Lux Eyepiece - 2" 40mm

40mm Kellner eyepiece designed for 2” focusers 3-element lens design with fully multi-coated optics Wide 56° apparent field of view allows you to view larger celestial objects Long eye relief (36mm) for comfortable viewing Threaded to accept most 2” filters Description Get more light to your eye and enjoy the low-power, wide-field views of Celestron’s E-lux 2” eyepiece. Designed to be used with any telescope with a 2” focuser, the Celestron E-lux eyepiece is a 3-element, fully multi-coated Kellner design with a 56º apparent field of view.  The 40mm E-lux eyepiece's very low power is perfect for those times when you need all the light-gathering your telescope can offer to see faint deep-sky objects. This 40mm 2" E-lux eyepiece is offered a la carte, but it is also included in the 2” Eyepiece and Filter Kit. If you are looking for multiple Kellner eyepieces, filters, and a Barlow, we recommend the 2” Eyepiece and Filter Kit. Body The 40mm E-Lux eyepiece has a main housing that is machined from high grade aluminum with a black anodized outer surface.   The internal surface of the mounting barrel has been machined with light dispersion threads that are painted matte black, to cut down on internal reflections for a clear viewing experience.  Viewing through the E-lux eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 36mm. Specifications Barrel Size (DIA): 50.8mm (2") Focal Length: 40mm (1.57") Apparent Field of View: 56° Optical Design: Kellner Number of Lens Elements: 3 Number of Lens Groups: 2 Optical Coatings: Fully multi-coated Eye Relief: 36mm (1.42") Parfocal Eyepieces: No Filter Threads: 50.8mm (2.0") Eye Guard: Yes, rubber, fold-down Weight: 12.5 oz (356 g) Dimensions: 125.20mm x 55.9mm DIA (4.93" x 2.20" DIA)