Eaurp Guz's old telescope and eyepieces. From left to right:
141mm f/8 catadioptric cassegrain. Spherical primary mirror. Hyperbolic secondary mirror. Sub aperture corrector lens behind secondary mirror. Primary mirror focus as well as removable rack & pinion focuser. 8x45mm finderscope. Magnification = focal length of telescope / focal length of eyepiece. True field of view = apparent field of view / magnification.
3.9mm Monocentric. 288x 25°. Really narrow fov but tack sharp planets. Uses smaller barrel diameter, kept in adapter ring. 24mm Kellner. 47x 42°. Low-mid power, middling fov. 31mm RKE. 36x 50°. Widest true field of view. "Floating stars" effect. 16mm Konig. 72x 55°. Medium power wide fov. 6.3mm Orthoscopic. 180x 45°. Low distortion eyepiece. 2x barlow magnifier lens. Doubles the magnification and halves the true field of view. Lens comes from a smaller barrel diameter (but different to the Monocentric), and has been adapted to the 330 untiglip format.
