GROISI STUDIO — Exposure & Capture Calculator

Keep exposure constant while changing shutter / aperture / ISO. Also includes an ND filter time converter.

Groisi Tools

Choose what you want to change, enter your current settings, then enter the new value for that setting. The tool computes equivalent settings for the other controls.

Change

Shutter

Aperture

ISO

Step mode

Rounding

Current shutter (seconds)

Example: 1/250 ≈ 0.004

Current aperture (f/)

Current ISO

New value for selected control

Example: 1/500 ≈ 0.002

Lock (optional)

Lock prevents that value from changing; the other control compensates.

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ND Filter Time Converter

Convert a base exposure to a new shutter time after adding ND stops.

Base shutter (seconds)

Example: 1/250 ≈ 0.004

ND strength (stops)

Rounding

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