Apps › AlphaND
AlphaND
Long exposures, calculated.
A fast, practical ND filter calculator for photographers. Enter your base exposure, add one or two filters, and read the final shutter time, with a built-in timer for Bulb mode.
iPhone
- 1 to 15stops of ND
- 2filters stackable
- 12saved favourites
More screens are on the App Store.
Features
What it does.
Standard shutter values
Results are rounded to the nearest camera-style value in 1/3-stop steps, from 1/8000 s up to multi-minute times. An optional toggle shows the exact figure.
Shutter or Aperture/ISO mode
Pick a base shutter from the wheel, or enter a metered shutter and adjust for a different aperture and ISO.
ND presets
ND2, ND4, ND8, ND64, ND1000 and ND32000, labelled with their optical density and stops, plus one-tap 3, 6 and 10 stop shortcuts.
Manual stops and stacking
Set 1 to 15 stops yourself, or stack a second filter (0 to 15 stops). The total feeds every calculation.
Bulb mode helper
When the result goes past 30 seconds, AlphaND highlights Bulb mode with a haptic, a beep and a pulse.
Countdown timer
Counts down the exposure and signals the end with a haptic and a sound.
Saved favourites
Save your settings and reload them with a tap. Up to 12 are kept on the device.
How it works
How it works.
Choose your base exposure
Select a shutter speed, or use Aperture/ISO mode.
Set the ND strength
Use a preset, a quick shortcut or manual stops, and stack a second filter if needed.
Read the result
See the large final shutter and the rounded standard value.
Go long
Past 30 seconds, switch to Bulb and start the countdown.
Details
Good to know.
Questions?
Ask about AlphaND.