Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Long Exposure Time Calculator
Calculates the correct long-exposure shutter speed when stacking ND filters, accounting for reciprocity failure. Use it when shooting waterfalls, light trails, or seascapes with neutral density filters.
Required Exposure Time
17.41 seconds
1-30 seconds is the in-camera range most bodies meter and time automatically; 30s is the typical maximum before you must switch to Bulb mode.
Each ND stop doubles exposure time per the 2^stops rule; the 8192-second result is base 1s pushed 13 stops. Bands flag practical capture limits.
Timelapse Interval Calculator
Determine the ideal interval between shots, total frame count, video clip length, and storage space needed for any timelapse project. Use it before setting up your camera to guarantee smooth footage without running out of card space.
Key differences
| Long Exposure Time Calculator | Timelapse Interval Calculator | |
|---|---|---|
| Category | Photography | Photography |
| Inputs required | 4 | 3 |
| Result | Required Exposure Time (seconds) | Shooting Interval (seconds) |
| What it does | Calculates the correct long-exposure shutter speed when stacking ND filters, accounting for reciprocity failure. Use it when shooting waterfalls, light trails, or seascapes with neutral density filters. | Determine the ideal interval between shots, total frame count, video clip length, and storage space needed for any timelapse project. Use it before setting up your camera to guarantee smooth footage without running out of card space. |