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
Optical Magnification Calculator
Find the total magnification of a microscope or telescope from objective and eyepiece focal lengths. Use it when selecting lens combinations or checking whether a setup meets a target magnification.
Fill in the required fields to see your result.
Key differences
| Telescope Magnification Calculator | Optical Magnification Calculator | |
|---|---|---|
| Category | Optics | Optics |
| Inputs required | 2 | 4 |
| Result | Magnification (×) | Total Magnification (×) |
| 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. | Find the total magnification of a microscope or telescope from objective and eyepiece focal lengths. Use it when selecting lens combinations or checking whether a setup meets a target magnification. |