The worlds first and only optical Shutter-Speed Tester.
Get the app and the PhotoPlug and start making precise exposures today.
The „PhotoPlug“ is a small device that fits to the headphone-jack of your iPhone or android smartphone.
It converts light into electrical signals which are transfered to the phone via the microphone input. In order to make a measurement, you have to open the camera back, point the camera towards a bright lightsource and position the PhotoPlug behind the camera.
A graphic in the Shutter Speed App will show a peak when the shutter opens and another when it closes. The time between the two peaks is the shutter-speed !
Additional to the PhotoPlug you wil need the APP "Sutter-Speed" which is availabe for download at Apple AppStore for all iOS-devices (iOS 8 or higher), as well as in the Google PlayStore for Android Smartphones (Android 4.0.3 or higher).