Delta Gray Cards - 8 in. x 10 in. (2 Pack)

Delta Gray Cards provide a neutral gray side of 18% (±1%) and a Zone System Study Guide.  Used to produce consistent image exposure and/or color in film and photography.

Based on the 18% standard reflectance on which all external and internal light meters are calibrated.

Simple to use for both amateurs and/or professionals.

Features:

• Two (2) cards 
• 8 inches by 10 inches (20.32 cm x 25.4 cm)
• Middle Gray - 18% (±1%) 
• Zone system Guide printed on the backside of each card