As one of its daily deals, B&H Photo Video offers the DxO One 20.2-Megapixel Digital Connected Camera for iPhone and iPad, model no. CAM01-00-USA, for $399 with free shipping. (Amazon has it for the same.) That's the lowest total price we could find by $137. It fits iPhones and iPads via a lightning connector and features an 11.9mm lens, 1080p HD video-recording function, OpticsPro and FilmPack software. Deal ends today.