This white balance filter is individually assembled, calibrated and certified for neutrality in the visible spectrum, and for 18% light transmission;It allows digital photographers to quickly and easily set an accurate custom white balance;It can be used on-the-fly to set a white balance in-camera when shooting JPEG, or later in post production when shooting RAW;Using this white balance filter to set a custom white balance results in consistently balanced color and eliminates many of the yellow, red and blue color casts commonly seen in digital photography;The white balance filter eliminates many of the inconsistencies and inconveniences associated with using white balance cards and targets, including unwieldy size, unwanted reflectivity, improper angling, and shadows