Set of three charts 8.5' x 11' (21.59 cm x 27.94 cm) Front of chart has multiple bar, wedge, zone, and star patterns for lens testing (works with any film or digital camera/video system Back of chart has rectilinear grid pattern for lens distortion testing (Barrel and pincushion distortion testing) Crossed 11-step grayscale for setting white balance, exposure, or gamma - may also be used with a waveform monitor or vectorscope High-resolution screen print on premium 14-point coated paper Color reference patches for natural and skin tone test colors and reference blocks for red, yellow, green, cyan, blue, magenta Designed in Boston and made in the USA