12.5mm Illuminated Reticle Telescope Eyepiece

12.5mm Illuminated Plossl Telescope Eyepiece specification: 1.This 4-element Plossl is well suited for off-axis guiders where light gathering is minimal 2.Great for accurate polar alignment 3.Fully multi-coated lenses, 40-degree apparent field 4.LED-illuminated double crossline reticle has adjustable focus and brightness 5.SR-54 batteries included. 1.25" detail data information: The 12.5mm Illuminated Plossl Telescope Eyepiece is great for accurate polar alignment. The 4-element Plossl design is also well suited for off-axis guiders, where light gathering is minimal. Fully multi-coated lenses, 40-deg apparent field. LED-illuminated double crossline reticle has adjustable focus and brightness. SR-54 batteries included. 1.25" diamete G.W./piece:0.146kg