Calibration Procedure
• Grab an 18 percent grey card;
• Set your camera to aperture exposure mode, and choose spot metering;
• Set an ISO setting and an aperture setting, and make sure that exposure
compensation is set to zero;
• Zoom in on the grey card and make note of the shutter speed that the
camera recommends;
• Compare this to what the light meter app suggests (with the
Luxi™
-
equipped mobile device sitting beside the 18 percent grey card in the
same light) and use the calibration sliders to fine-tune the app so that
the shutter suggestion matches your camera’s readings.
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