An 18 % Gray Card is a simple gray-coloured card which uniformly reflects 18% of the light which falls upon it. Gray cards can be used as a reference to set the camera exposure or to calibrate a light meter (light meters are used to determine which exposure setting is required to produce a medium gray tone).

Gray cards are usually made from coated cardboard or polystyrene and come with a protective cover. They are an inexpensive and useful addition to the photographers' kit.

This simple iPhone version allows you to have a Gray Card with you at all times!

“18% Gray” is the standard calibration colour used by both professional and amateur photographers worldwide allowing for fast and colour correction back at the digital studio.

FotoCard Features:
- 18% Gray Card
- Pure Black Card
- Pure White Card
- Combination Card
- Supported within all leading image processing software