4k action camera sport camera series nikon keymission effective resolution video 239 megapixel sensor type cmos video 4k full hd hd lens nikkor lens type ultra wide angle focal length 16 mm video focal length 35mm equivalent 8 7 mm photo focal length 35mm equivalent 8 7 mm lens speed 2 closest focusing distance 30 cm field of view 360 display type none storage media memory card supported memory cards micro sd micro sdhc micro sdxc con