These miniature charts have the same 18 color patches as the GretagMacbeth™ColorChecker®, plus 12 spectrally neutral gray patches to assess correct exposure and white balance in closeup or macro photography applications. The patches are mounted on aircraft grade anodized aluminum and are set below the top surface to help protect from damage.
Gloss: Gray patches have an extended dynamic range (density ~ 2.4) and are suitable for measuring camera imager noise. Specular reflections from the gloss surface may occur for illumination geometries less than 45°/0° when used without crossed polarizers.
Matte: Gray patches have a lower dynamic range (density ~ 1.6) but are more suited to narrow illumination geometries such as those used in endoscopic imaging or direct-on camera flash units. Because the matte surface can be interpreted as imager noise, we do not recommend using matte gray patch targets for evaluating imager noise in high magnification applications.