Maksutov-Cassegrain & RC-Telescopes, optical tubes

GSO Mirror Set for Self-Construction of a 16" f/8 RC Telescope The mirror set consists of a hyperbolic primary mirror and a hyperbolic secondary mirror for the construction of a Ritchey-Chretien telescope. The main mirror has small shell fractures around the center hole, but these are in the shadow of the secondary mirror aperture tube and thus have no negative optical influence. Main mirror: diameter 400 mm bore 120 mm, edge thickness 44 mm, center thickness 40 mm, weight 10.75 kg ; secondary mirror diameter 176 mm with edge thickness 18 mm , weight 1 kg ♦ With the mirror set you can build an RC telescope with 406 mm aperture and 3248 mm focal length. ♦ The set consists of primary mirror and secondary mirror without mechanical accessories ♦ The mirrors are made of quartz glass (similar to Zerodur) for stable focus position. ♦ 99% reflectivity on main and secondary mirrors with a quartz protective layer

Item condition: used, but with visible cosmetic markings

The easily transportable Sky-Watcher Startravel-102 AZ-Go2 telescope is specifically designed for wireless control via smartphone or tablet, using the freeware SynScan app for iOS and Android. The AZ-Go2 mount has a built-in WiFi module for this purpose, which generates its own WiFi network, so that the mount can be operated anywhere without an existing WiFi or mobile network. After entering coordinates into the app and performing a simple alignment procedure, you're ready to explore the universe with the app's intuitive touchscreen menus. The AZ-Go2 mount with the SynScan app provides fully computerized GoTo control, allowing you to automatically align the telescope to any object in the extensive database of more than 10,000 celestial objects. Included in the set is the very compact and powerful Skymax-102 Maksutov Cassegrain telescope with 102mm aperture. It is ideal for observing surface details on the Moon and bright planets. The high resolution and long focal length optical system with multicoating provide the maximum contrast and high sharpness. Scope of delivery: 102mm Maksutov Cassegrain telescope AZ-Go2 mount Illuminated dot finder Eyepieces 10mm & 25 mm 90° 1,25" zenith mirror Stainless steel tripod with shelf !Power supply and batteries are not included!

Item condition: new, but not original packed

BRESSER Messier MC-127/1900 EXOS-2 Telescope ; SCOPE OF DELIVERY Maksutov Optical Tube Assembly 26mm SuperPlössl eyepiece (31.7 mm / 1.25'') SC Eyepiece adapter (31.7 mm / 1.25'') Star diagonal mirror Dovetail plate for GP Level LED viewfinder Adjustable polar finder scope with optional illumination Aperture solar-filter Rotatable star map Astronomy Software Stellarium (via download) Equatorial EXOS 2 GOTO mount and Startracker handheld computer Stainless steel tube field tripod with accessory tray 1 x 4.5 kg counterweight

Item condition: new and original packed