With Shutter-Speed you can test the Shutter speeds of your analog cameras just with your iPhone.

Please note that the full potential of this App is only reached if you use it in combination with the PhotoPlug. The PhotoPlug is an optical sensor which connects to the headphone-jack of your iPhone and enables you to measure the actual amount of light passing through the camera shutter.

Please visit www.photoplug.de for detailed information and instruction.

The App also allows you to save the measured values into a handy table. Furthermore, the App automatically calculates a correction factor, which allows you to compensate a faulty shutter speed. For example, if you measure the 1/60s and it turns out to be just 1/50s, the App will tell you that the shutter-speed is 1/3 f-stops too long. This gives rise to a correction factor of -1, indicating that you have to close your aperture by 1/3 f-stop to get a correct exposure.