Telescope calculator pro

4.7
113 reviews
1K+
Downloads
Content rating
Rated for 3+
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About this app

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
Updated on
Feb 17, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info
This app may collect these data types
Financial info
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
103 reviews
A Google user
June 6, 2019
A really great tool for comparison shopping for a new telescope. It also allows you to try a multitude of "what if" specifications. The app is feature rich and easy to use as well. A nice bonus is the view using the WFC3 on the Hubble Telescope.
40 people found this review helpful
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A Google user
January 15, 2020
I do find the app very useful for astrophotography. I would like you to add a .5 focal reducer selection under the Barlow lens section. It would be handy to have a save function to save my different telescope and camera combinations. Thanks for the app.
11 people found this review helpful
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א.מ.
January 15, 2020
Focus reducer Celestron f/6.3. Barlow Lens = 0.63x. Click on the eyepiece -> edit and change the list of Barlow lenses. Use side bookmarks, in the settings you can increase the number of bookmarks
A Google user
January 28, 2020
Very good app that calculates necessary information when using telescopes, eyepieces and oculars, and also shows the picture what you can expect. Large database of telescopes. Nice work! Very useful.
10 people found this review helpful
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What's new

v4.0.0
account for storing settings

v3.6.0
increased slider input

v3.5.1
+ NGC891, NGC4565, NGC4631, NGC6960, NGC6979, NGC7662

v3.5.0
- changed settings, choice of object and language
- full-screen advertising is twice as rare
+ M97, NGC2359, NGC2392, NGC2440, NGC5189, NGC6302, NGC6543, NGC7000, IC1805, IC1848, IC2118

v3.4.0
settings
- hide 2D-D/6
- coordinates of the planets
- observation coordinates

+ Asteroids

+/- Three in a row selection