Spectrophotometer tested - the best card available
Larger 8x10 size easily fills the frame for custom White Balance shots
Works for RAW or JPEG pictures
Suitable for any digital or film camera
Economical, portable, and accurate
Provides a neutral gray side of 18% (A + 1) and a Zone System Study Guide. Correct exposures every time regardless of contrast, brightness or conditions. For color or black and white photography. Complete instructions for use. Simple to use for amateur or professional. Based on the 18% standard reflectance on which all external and internal light meters are calibrated.