We all know that if an object is absolutely black, its reflectivity is 0, if it is absolutely white, then its reflectivity is 100%. Virtually all objects are between these two extremes. If a shade of gray reflects 18% of light, it is 18% gray. If you mix the light, dark, and midtones of all the objects in nature, the result is 18% gray. Therefore, the photometric system in the camera is designed to reproduce the brightness of this 18% gray. No matter if you aim the metering system at any hue object for metering, it always "thinks" that the subject is a mid-gray tone and provides exposure data that reproduces the mid-gray tone. The 18% gray board is professionally chromaticity corrected. It is a necessity for those who have strict exposure requirements. It is more effective when used with a light meter. It is an ideal accessory for portraits, flowers, remakes and other photography. Photos with rich layers and saturated colors come from precise exposure. If the light in the shooting scene is too bright or too dark, it may cause deviations in the exposure. The gray card can balance complex light scenes to 18% neutral gray, and the reflected light of the gray card can be recorded by the light meter to obtain the accurate exposure value! Package quantity:18% gray card (gray card), black and white balance card Size: 3.35X2.2 inches Lanyard with removable clip-so you will not lose them when not in use.

The set includes 3PCS portable compact color calibration cards and high-quality lanyard. Get the correct white balance in a few seconds and always get the perfect photographic exposure. Perfectly set precise color balance. Suitable for any digital camera. Very suitable for DSLR, video, film and photography. Any digital camera that can customize the white balance can be used together. Dimensions: 3.35x 2.2 inches (8.5x5.5 cm). Compact, strong and light. Small enough to fit in a pocket or keychain. Neutral 18% gray/gray card, matte surface, scratch resistant. Non-reflective and waterproof.

Manufacturer: RLECS. Date First Available: April 24, 2022. Best Sellers Rank: #70 in Photographic Light Meter Grey Cards. Item model number: BCLSVF-1S. : B09YQ4NVMS. Item Weight: 1.44 ounces. Package Dimensions: 4.72 x 3.62 x 0.47 inches.