Expanded Specifications Celestron 102mm Astro-Fi Maksutov-Cassegrain Telescope
Optical Design: Newtonian Reflector
Aperture: 114mm (4.49")
Focal Length: 900mm (35")
Focal Ratio: f/7.89
Focal Length of Eyepiece 1: 20mm (0.79")
Magnification of Eyepiece 1: 45x
Focal Length of Eyepiece 2: 4mm (0.16")
Magnification of Eyepiece 2: 225x
Barlow Lens: 3x
Finderscope: 5x24
Mount Type: German Equatorial
Accessory Tray: No-Tool Tray with Eyepiece holder
Tripod: Aluminum
Highest Useful Magnification: 269x
Lowest Useful Magnification: 16x
Limiting Stellar Magnitude: 12.8
Resolution (Rayleigh): 1.22 arc seconds
Resolution (Dawes): 1.02 arc seconds
Light Gathering Power (Compared to human eye): 265x
Apparent Field of View: 0.9°
Linear Field of View (@1000 yds): 48 ft (15 m)
Secondary Mirror Obstruction: 25mm (1")
Secondary Mirror Obstruction by Diameter: 22%
Secondary Mirror Obstruction by Area: 4.96%
Optical Coatings: Aluminum
Optical Tube Length: 864mm (34")
Software: Celestron Starry Night Basic Edition Software and SkyPortal App
Solar Warning
  • Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
  • Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
  • Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.