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Opteka Medium 5 X 4 inches Color and White Balance Reference Grey Card Set With Quick Release Neck Strap for Digital Photography

Product Description

Includes three color calibrated reference cards

Dimensions 5" X 4" 0.1" (130mm by 100mm)

Logo label with focus target is affixed to one side of the grey card. Both sides of the cards are usable for white balance

Works with any digital camera, for JPEG and RAW files

Lanyard Strap Included

Imported from USA

The color values of Opteka Digital Grey Card set have been tested under varying light conditions and show a high degree
of spectral neutrality. Using the industry-standard X-Rite spectrophotometer, LAB values of L* 63.8, a* -1.6, b* -0.4
are measured from the surface of the grey card under D50 standard illuminant. For optimum color correction, the black
card achieves truly deep blacks (RGB 16,16,15). The grey card displays superior spectral neutrality with measured values
of 162, 162, 160. The white card has a tested RGB value of (220, 224, 223). All three cards have excellent uniformity
across a range of light sources.