Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
Astronomy
Meteor Shower Activity Calculator
Estimate how many meteors per hour you will actually see during a meteor shower, accounting for radiant altitude, sky darkness, and moonlight. Use it on the night of a shower to set realistic expectations.
Fill in the required fields to see your result.
Key differences
| Telescope Magnification Calculator | Meteor Shower Activity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 4 |
| Result | Magnification (x) | Expected Hourly Rate (meteors/hour) |
| What it does | 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. | Estimate how many meteors per hour you will actually see during a meteor shower, accounting for radiant altitude, sky darkness, and moonlight. Use it on the night of a shower to set realistic expectations. |