Celestron C90 is a slim spotting telescope in the Maksutov system with a diameter of 90 mm, appreciated as a portable astronomical telescope, nature telescope and telephoto lens. Often chosen by aircraft observers at cruise altitudes.
Technical parameters
• optical system: Maksutow-Cassegrain • Diameter: 90 mm • focal length: 1250 mm • lighted: 1/14 • finder: 8x21 • eyepiece: 32 mm (1.25 "/ 39x magnification) • Angular field of view for the eyepiece in the set: 1.3 ° • linear field of view for the eyepiece in the set: 23 m @ 1000 m • distance between the eyepiece and the eye: 20 mm • the smallest focusing distance: 4.57 m • coatings: Multi-Coated • tripod mount: yes • camera mount: optional T-Adapter • tube length: 406.4 mm • nylon case included • weight: 2.27 kg
Equipment
• eyepiece: 32 mm / 1.25 " • Optical finder 8x21 • 45 ° angle cap • nylon cover