Despite all the advancements in smartphone photography, the photos produced still can’t hold a candle to a DSLR or even a good point-and-shoot camera. Some companies have tackled this with accessories like lens attachments, flash units, camera cases, and more. DxO, known for its Raw conversion software and image sensor benchmarks, is joining that growing list of companies with the One.

shoot raw iphone This small add-on camera connects to an iPhone or iPad via the Lightning port and packs an f/1.8 32mm (equivalent) lens as well as a 20-megapixel BSI-CMOS sensor inside. This is the same sensor that Sony uses in its RX100 III, which is priced at almost $800 -- needless to say it’s no cheap affair.

The One will reportedly produce DSLR-quality images in SuperRAW format, which are stored on a removable microSD memory card, while ready-to-share JPG versions are saved to your iPhone’s cameral roll. A companion iOS app lets you access all the manual controls quickly and easily, including an ISO range of 100 to 51,200 and shutter speeds between 1/8,000 to 15 seconds.

Compared to similar clip-on cameras that connect wirelessly, the One’s use of the lightning port means there’s no lag in the Live View feed on your smartphone’s display. When attached it can also pivot 60 degrees in either direction, or you can flip it around into selfie mode. You can also use the DxO as a standalone camera but you are limited to auto mode with no live feed.

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Measuring in at just 2.7 by 1 by 1.9 inches (HWD), and weighing 3.8 ounces, the One can fit in your pocket with ease. Priced at a whopping $600, the company is aiming this at serious photographers who want to have quality without lugging around their DSLR, or want to have access to their high-resolution photos on their smartphone immediatly after snapping it.

The camera will ship in September but DxO is accepting pre-orders starting today. Those who buy in also get DxO FilmPack and (for a limited time) the Elite Edition of DxO OpticsPro desktop editing software.