Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Astronomy
Astrophotography Exposure Calculator
Calculate the recommended sub-frame exposure time for deep-sky astrophotography based on your telescope, camera, and sky conditions. Ideal for planning imaging sessions targeting galaxies, nebulae, or star clusters.
Fill in the required fields to see your result.
Astronomy
Telescope Magnification Calculator
Compute the effective magnification of your telescope with any eyepiece and Barlow lens combination. Ideal for planning high-power planetary sessions or choosing the right Barlow multiplier.
Fill in the required fields to see your result.
Key differences
| Astrophotography Exposure Calculator | Telescope Magnification Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 4 | 2 |
| Result | Optimal Exposure Time (seconds) | Magnification (x) |
| What it does | Calculate the recommended sub-frame exposure time for deep-sky astrophotography based on your telescope, camera, and sky conditions. Ideal for planning imaging sessions targeting galaxies, nebulae, or star clusters. | Compute the effective magnification of your telescope with any eyepiece and Barlow lens combination. Ideal for planning high-power planetary sessions or choosing the right Barlow multiplier. |