Chart used to create exposure profiles.
Use the free download software "Data Transfer Software" from Seconic HP, to graph, numerize and create a profile of digital camera's reproducible exposure ranges, and input it into the exposure meter to determine the exposure selection.
25 patches are printed from black to white at 1/6 EV intervals, allowing you to check the concentration of plus minus 2EV around 18% gray at a single shot.
The back of the chart is 18% gray card on the front, which is convenient for setting the manual white balance of your digital camera. Size: 9.2 x 5.4 inches (233 x 138 mm).

Specifications:
Size: 9.2 x 5.4 inches (233 x 138