Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Optics
Telescope Magnification Calculator
Calculate the magnification, resolution, and light-gathering power of any telescope from its objective focal length, eyepiece, and aperture. Ideal for astronomers choosing eyepieces for a target.
Fill in the required fields to see your result.
Optics
Telescope Resolution Calculator
Determine the angular resolution, light-gathering power, or limiting magnitude of a telescope based on aperture and wavelength. Perfect for amateur astronomers comparing instruments or planning observations.
Fill in the required fields to see your result.
Key differences
| Telescope Magnification Calculator | Telescope Resolution Calculator | |
|---|---|---|
| Category | Optics | Optics |
| Inputs required | 2 | 4 |
| Result | Magnification (×) | Result |
| What it does | Calculate the magnification, resolution, and light-gathering power of any telescope from its objective focal length, eyepiece, and aperture. Ideal for astronomers choosing eyepieces for a target. | Determine the angular resolution, light-gathering power, or limiting magnitude of a telescope based on aperture and wavelength. Perfect for amateur astronomers comparing instruments or planning observations. |