Shutter Speed Adjust
Shift a shutter speed by stops to find the next slower or faster setting.
About Shutter Speed Adjust
Each stop halves or doubles the exposure time, so multiplying the current time by a power of two moves through the shutter series. Swapping stops between shutter and aperture or ISO keeps exposure balanced, and the right speed decides motion blur versus freeze.
Formula
Shutter Speed Adjust
New time = (1 / shutter) x 2^stops; speed shown as 1/X
- stop
- Halving or doubling the exposure time
Worked example
With the default values below, Shutter Speed Adjust returns New Exposure Time of 0.0020. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Current (1/X)minimum 1
- 125
- Changeone of -6 stops (faster), -4 stops, -3 stops, -2 stops, -1 stop, +1 stop (slower), +2 stops, +3 stops, +4 stops, +6 stops
- -2 stops
Results
- New Speed (1/X)
- 500
- New Exposure Time
- 0.0020 s
- Direction
- Faster - freezes motion better
Step by step
- 1Values used
- 2Shutter Speed Adjust
- 3New Exposure Time= 0.0020 s
- 4New Speed (1/X)= 500
- 5Direction= Faster - freezes motion better
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Shutter Speed Adjust calculated?
New time = (1 / shutter) x 2^stops; speed shown as 1/X Each stop halves or doubles the exposure time, so multiplying the current time by a power of two moves through the shutter series.
Why does Shutter Speed Adjust matter?
Swapping stops between shutter and aperture or ISO keeps exposure balanced, and the right speed decides motion blur versus freeze.
What values do I need to enter?
This calculator takes 2 inputs: Current (1/X), Change. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.