Tele Vue NP101is Imaging System 4" f/5.4, 4-Element APO Refractor Telescope Optical Tube Assembly, Ivory

Concept: CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. Tele Vue knew it's APO objectives were up to the challenge, & with the proper tweaks would be extraordinary tools for the imager. With Tele Vue Imaging System (is) telescopes, they have refined their instruments & optional equipment beyond anything a CCD chip has seen.It started small (literally) in 2005 with the Tele Vue-60is & available Digital Micrometer Kit. Achieving critical acclaim with the 60is, Tele Vue was encouraged to further develop "is" telescopes & accessories to maximize aperture, real field coverage & performance, & to make the processes easier for the imager.For 25 years, Tele Vue has pushed the boundaries of APO refractors, & eyepieces, to the recognized pinnacle of performance. They were gratified but not surprised that Backyard Astronomer's Guide said of the NP101: "optics don't get any better than this." No wonder "Sky and Telescope" rated the NP101 tops & selected it as the test instrument for its landmark review of the SBIG STL-11000 CCD camera. The "is" versions of the Tele Vue- 60, 102i, NP101 & NP127 retain the exemplary wide field & planetary visual capability while adding new features to make imaging easier & more flexible.Tele Vue-NP101is Tele Vue-NP127is:Tele Vue was determined to make the NP series optically, mechanically, & functionally as perfect as poss