30CM White/Grey Card Features:

1. The grey side is for accurate exposure and the white side is for setting the white balance. 

If the photos you shoot are always too dark or too bright, blue or yellow, then use this.

2. Double-sided design.

3. the middle of the 18 degrees gray card with a secondary focus scale, the other side is pure white, which is the best way to tune the white balance color of photography.

It can be folded into the small bag when not in use, easy to carry and use

Advantages compared to ordinary cardboard gray card: can be folded, easy to carry, PU leather texture is not easy to damage, dirty can scrub, long service life. 

4. Gray side: Reflectance 17.8%; Density 0.74

   for Max. deviation of reflectance: 3%

   for Max. error in exposure measurements: 1/8 of F-stop

5. Size: 30 x 30cm 

3-Color Calibrated Reference Card Features: 

Neutral 18% Grey / Gray Card with matte finish for scratch resistant. Non Reflective and Waterproof.

Perfect for setting exact color balance. Works with any digital camera. Perfect for DSLR, Video, Film and Photography.

Card size:3 1/3*2 1/8 inches( 8.5*5.4cm). Small enough to keep in your pocket or on a keychain.

Compact, sturdy and Lightweight. Net weight:35.5g

Package includes three color calibrated reference cards+premium landyard with a detachable clip.