During their Zenmuse X7 event in Hollywood, CA on October 11, 2017, DJI announced four new prime lenses clearly aimed at the professional photographer or filmmaker. The widest angle lens is a DL-S 16mm F2.8 ND ASPH lens with a built-in 4 stop ND filter, to allow for wide-open shooting during daylight to achieve cinematic shallow depth-of-field footage. The 16mm lens is the only one of the four prime lenses, that does not have a leaf shutter. Any filter with a diameter of 46 mm that weighs 10-12 grams and is no thicker than 4.4 mm can be used with Zenmuse X7 lenses, according to DJI. When taking stills, the focal length multiplier is 1.5m turning the 16mm lens into a 24mm lens.