Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Optics
F-Number Calculator
Compute the f-number (f-stop) of a lens by dividing its focal length by the aperture diameter. Use it when selecting lenses, comparing lens speed, or setting exposure in photography.
Fill in the required fields to see your result.
Optics
Magnification Calculator
Compute the optical magnification of a lens or mirror by comparing the image height to the object height. Use it to determine whether a lens enlarges, reduces, or inverts an object.
Fill in the required fields to see your result.
Key differences
| F-Number Calculator | Magnification Calculator | |
|---|---|---|
| Category | Optics | Optics |
| Inputs required | 2 | 2 |
| Result | F-Number | Magnification (Γ) |
| What it does | Compute the f-number (f-stop) of a lens by dividing its focal length by the aperture diameter. Use it when selecting lenses, comparing lens speed, or setting exposure in photography. | Compute the optical magnification of a lens or mirror by comparing the image height to the object height. Use it to determine whether a lens enlarges, reduces, or inverts an object. |