Calculation of parameters and characteristics of telescopes using different eyepieces and visualization.

Settings:
– language (Russian, English, Hungarian, Spanish, German, French, Romanian, Croatian, Italian, Sinhala, Norwegian, Persian, Polish, Japanese, Portuguese, Korean, Catalan, Dutch, Arabic, Greek, Malay, Luxembourgish, Hindi, Indonesian , Ukrainian, Hebrew, Sardinian, Czech, Swedish, Finnish, Chinese, Bengali, Tamil, Slovenian, Turkish, Bosnian, Thai, Bulgarian, Vietnamese)
– scale
– text font size
– input by the slider
– comparison of telescopes
– bookmarks
– Moon phases
– help
– swipe

Telescope:
– List of telescopes
– Diameter
– Focal length
– Focuser

Eyepiece:
– Eyepiece list
– Focal length
– Field of view
– Barlow lens

Camera:
– list of cameras
– pixel size
– image size
– matrix size
– Binning

Calculations:
– Magnification
– Stellar magnitude
– Field of view
– Maximum field of view
– f-number
– Diameter of exit pupil
– Angular resolution
– Size of craters on Moon
– 2D, 1.4D, 1D, 0.7D, 0.5D

– Sun
– ISS

Planets:
– Mercury
– Venus
– Earth
– Mars
– Jupiter
– Saturn
– Uranus
– Neptune
– Pluto

Asteroids:
– Ceres
– Pallas
– Juno
– Vesta
– Ida
– Gaspra

Satellite:
– Moon
– Titan
– Io
– Europa
– Ganymede
– Callisto
– Titania
– Ray

Messier:
M1, M8, M13, M16, M17, M20, M27, M31, M33, M42, M45, M51, M57, M58, M63, M64, M74, M78, M81, M82, M83, M88, M97, M99, M100, M101, M104, M108

NGC:
891, 2359, 2392, 2440, 4565, 4631, 5189, 6302, 6543, 6960, 6979, 7000, 7662

IC:
1805, 1848, 2118