This SV152 Reticle Eyepiece 20mm premium 1.25" wide angle eyepiece includes an illuminated Single crosshair reticle that greatly simplifies centering celestial objects in the eyepiece for more accurate go-to alignment and tracking; An invaluable aid to centering guide stars and astrophotography target objectsIt is the field of view that mattersWide 70-degree apparent field of the sky allowing you to find objects and alignment stars more easily than shorter focal length eyepieces ;Comfortable 16mm eye relief; lets you easily find and locate target objectsThe perfect eyepiece not just for astrophotosThere are also other uses for the SV152 crosshair eyepiece; The lighting part of the product is removable;with it you can use it as an illumination eyepiece.;remove it and you can use it as ordinary eyepieceHumanized design Included Rubber caps; keep your eyepieces clean in all directions Smooth and stable focusing ring with non-slip rubber ring Internal matting thread to reduce stray light entering the eyepiece . You can use this handy scope as a deluxe, straight-through 60mm finder by inserting an optional 1.25" eyepiece (sold separately). A practical benefit of this is that prior to guiding, you can insert an eyepiece into the guide scope and easily align the guide scope with your main imaging telescope. Then remove the eyepiece and attach your autoguider camera This complete guide scope comes with two heavy-duty guide scope rings and a 3.5" long, 1.18"wide dovetail mounting bar, which is compatible with dovetail finder scope bases for easy attachment. The dovetail bar features five threaded through-sockets for versatile attachment options.