Relatively low-power 20mm 1.25" telescope eyepiece with an illuminated crosshair reticle with myriad uses is a welcome addition to any astronomer's accessory case The perfect telescope eyepiece for alignment of computerized GoTo systems or IntelliScope systems with a comfortable 16mm eye relief An invaluable aid to centering guide stars and astrophotography target objects - you'll wish you had one long ago! Illuminated crosshair precisely centered in eyepiece field of view for accurate results Wide 70-degree apparent field of view makes acquiring and centering target objects a breeze

Seller's own experience

First off I want to mention the build quality of this eye piece. It has some good weight to it, this isn't a cheaply made eye piece and I'd venture to say it will stand the rest of time. The eye cup is sturdy and looks like it will hold up to folding and unfolding for a while also. As far as the views you get through it, that doesn't really matter since you just want to use it to align your mount anyways. The FOV is nice not that its really all that necessary but if your alignment star is way off center it makes it nice. Then for the illumination. You can adjust it and easily see even a very dim star through the reticle.

Main Features:

1.Wide 70-degree apparent field of view makes acquiring and centering target objects a breeze w/ Comfortable 16mm eye relief 2.Illuminated crosshair precisely centered in eyepiece field of view for accurate results 3.Relatively low-power the external illuminator with adjustable brightness with an illuminated crosshair reticle 4.Internal thread extinction treatment well suppresses internal stray light reflection 5.Filter thread of standard 1.25 inch can be compatible with all standard 6.The perfect eyepiece for alignment of computerized GoTo systems 7.An invaluable aid to centering guide stars and astrophotography target objects

Package Includes:

1X1.25" SWA 70-Degree F20mm Eyepiece 1XLED Illuminator 2X Rubber Eyepiece Caps 2X1.5V Button Cell 1XMirror Cloth