300mm Portable Photography Reflector Gray and White Balance Card

Info:
Features:
Play the role of gray board, also for automatic and manual lens practice.
18% standard gray, gray board side, with auxiliary focus-scale, whiteboard side is an nice accessory for tuning white balance.
Focusing board is the benchmark for accurate detection. Colorful pictures come from the exact exposure. Exposure to lighting may have a deviation if the light of the scene is too bright or too dark.
Focusing board can make complicated light scene to change to the 18% neutral gray, through the light meter record the focus-plate reflected light, you can get accurate exposure value.
Easy to carry, PU leather texture is not easy to damage, dirty can scrub, long service time.