Alstar Reticle Eyepiece, 1.25" LED Illuminated Telescope Plossl Eyepiece

Precision Tool: Illuminated Reticle Eyepiece with red LED illuminated dual-line crosshair reticle precision tool for measuring double star separations planetary lunar dimensions and celestial position angles ^^
Comfortable Eye Relief: This Illuminated Crosshair Eyepiece offers a wider field of view with bright high-contrast images featuring a 40 degree apparent field of view and 11 mm of comfortable eye relief ^^
Premium Multi-Coated Optics: Featuring a multi-coated 4-element Plossl design for superior color correction and image sharpness; Blackened lens edges and anti-reflective threads reduce stray reflections and glare ^^
Double Crosshair Eyepiece: The double crosshair design facilitates precise alignment of target objects enhancing the accuracy of locating and centering celestial bodies; Great for polar and goto alignment and centering guide stars ^^
Brightness Adjustable: Requires three L1131F button cells (not included); The 12.5 mm eyepiece features stepless adjustment via a knob on the side for comfortable use in different observing conditions ^^
Independent Dioptre Adjuster: A separate dioptre adjuster lets you fine-tune focus so the target and crosshair stay sharp together, helpful for users with different vision needs ^^ Solid
Metal Housing: The eyepiece uses a sturdy all-metal housing that protects internal optics and maintains alignment; A standard 1.25 -inch filter thread lets you attach compatible filters and accessories ^^
Professional Performance: Designed for astronomy enthusiasts, this illuminated reticle eyepiece delivers professional-grade performance for precise measurement, alignment, and astrophotography support