Calibration

3-in-1 Digital 18% Gray / White / Black Card Set White Exposure Balance+StrapGreat accessory to produce excellent pictures by providing precise exposure Say No to excessively bright or dark environment; adjust with it as you need Gray card..

Product information "walimex Foldable Gray Chart 30x30cm"for measuring the exact exposure gray side with 18% reflection for exposure metering white side for white balance for avoiding color faults in your pictures and ensurin..