Four-element 125mm focal length 125 Plossl telescope eyepiece with an illuminated double crossline reticle Excellent for accurate polar alignment GoTo system alignment IntelliScope system alignment and acquiring and centering of guide stars for guided astrophotography pursuits Fully multi-coated lenses provide bright views with a 40 apparent field of view LED-illuminated double crossline reticle has adjustable focus and brightness Illuminator requires three GP-189 batteries included
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