Celestron C5 f/6 telephoto, 750mm focal length.
- Celestron 1 1/4" 45 deg. erect image prism diagonal (dual brass setscrews)
- Celestron 1 1/4" 25mm Kellner eyepiece
- leatherette carry case
- operating manual (Nov 1978)
- attached tripod mounting base with 1/4"-20 threaded hole
The OTA (S/N 1502), case and manual appear to be the original 1978-ish parts and are in very good condition. The diagonal (Model #94112-A) and eyepiece are probably newer. I got this from an Astromart seller a couple years ago and haven't used it much since then. It gives nice images with eyepieces 30mm or less. Much longer than that and you can start to see the secondary shadow. I haven't actually used it as a telephoto lens. It didn't work well with a digital camera and Scopetronix eyepiece, there was lots of curvature and vignetting. That's my experience with it, I got it more for the collector appeal than the optics, but I have too much astronomy equipment so the unused items must go.
Price includes ground shipping to USA or Canada.