 |  |  |  |  |  |  |  |  |  |
A standard reference for exposure evaluation and grading.
One side of the card has a neutral 18-percent reflection which can be used indoors to aid in measuring the average reflection for a typical subject. You can also use this side of the card outdoors by increasing the exposure 1/2 stop above the calculated exposure. The other side of the card has 90-percent reflection for use at low-light levels.
