Celestron OMNI 40mm Eyepiece Professional HD Astronomical Eyepiece

OVERVIEW
Omni eyepieces offer a quality 4-element Plossl optical design at a super affordable price.
Rubber eyecups provide comfort and increase contrast.  Leave them up or fold them down when wearing eyeglasses.
Beautiful matte aluminum barrels and blackened lens edges prevent internal reflections.
1.25” barrels are threaded to accept filters.  
DESCRIPTION 
Celestron Omni series eyepieces offer a 43º apparent field of view, perfect for the Moon, planets, and a plethora of deep-sky objects.  The premium four-element optical set is finished with multiple layers of high-transmission coatings for clear, sharp images.   The edges of the optics are blackened for increased contrast. 
The Omni eyepiece body is made of aluminum.  A two-step anodizing process results in a beautiful matte finish that resists reflections and glare.   Each eyepiece in the Omni Series includes a black rubber eyecup.  It can be left up or folded down for better observations while wearing eyeglasses.  Models with a longer barrel (15 mm, 32 mm, 40 mm) include a rubberized grip for non-slip handling during observing sessions. The insert barrel is threaded to accept 1.25” filters. 
Celestron Omni eyepieces are also available in the following focal lengths in a 1.25” format:4 mm, 6 mm, 9 mm, 12 mm, 15 mm, 20 mm, 25 mm,if you need to buy them,pls check the link in our website to buy.  
SPECIFICATIONS 
Focal Length:40 mm (1.57 in)
Apparent Field of View:43 °
Eye Relief (mm):31 mm (1.22 in)
Number of Lens Elements:4
Barrel Size (in):1.25 in (32 mm)