TS 50mm f6.6 APO refractor and ED telephoto lens Aperture 50mm and 330mm focal length.
Focal Ratio f6.6 – 50mm ED high quality air spaced doublet lens.
A powerful “pocket” scope with the same optics as the legendary Stellarvue ED50 NB. Tube clamp has some scratches around the securing screw and OTA tests very good optically.
The TS 70mm f6.78 Quad is a great travel telescope for photographers and observers. The corrector is built into the OTA, so you just focus and you’re automatically at the optimal distance. The TSED70Q has a comfortable working distance of 135mm from the 2″ end, so you can easily use 2″ star diagonals and eyepieces and still reach focus.