From the Manufacturer:
Sony's made the impossible possible. Once considered merely a dream is now a reality that can sit in the palm of your hand. Introducing the revolutionary RX1: The world's first fixed lens digital camera with a full-frame sensor. Take it wherever you go and explore full manual control photography that knows no bounds.
Go full or go home.
This is huge. A whole new world of high-quality images are realized through the 35mm full-frame 24.3MP sensor, a normal sensor range of ISO 100–25600, and a sophisticated balance of high resolving power, gradation and low noise—and it's all in the palm of your hand. The BIONZ image processor enables 5 fps high-speed continuous shooting and 14-bit RAW image data recording.
Bright f/2.0 Carl Zeiss Sonnar T* lens.
This is definitely not your standard point-and-shoot lens. A newly developed large-diameter f/2.0 Carl Zeiss Sonnar T* lens with 9 aperture blades delivers refined background defocusing and macro capabilities. A premium multi-layered T* coating also dramatically reduces ghost and flare caused by light reflection.
Full HD 24p video.
It's like a high-end video camera that's as mobile as you. Experience Full HD 24p/60i/60p video with manual control and audio input, plus creative flexibility while shooting movies and stills. Enable the Program Auto (P), Aperture Priority (A), Shutter Speed Priority (S) or Manual Exposure (M) mode for manual shooting and exposure control, plus clear sound recording via the built-in stereo microphone.
Amazing low-light performance.
Now you can capture the mood of the moment without a flash. The combination of the RX1's large 35mm sensor and bright f/2.0 Carl Zeiss Sonnar T* lens with class-leading image processing and noise reduction deliver outstanding low-light performance to capture the moment as you see it.
Ultra-fast focusing speed.
So small, yet so quick. To improve focusing speed and sensitivity, the Exmor CMOS sensor uses its rapid throughput to deliver high-quality image signals to the camera's BIONZ processor, which provides intelligent response data to a new high speed actuator motor in the lens. The result is fast, accurate focusing speeds.
Add on with a multi-interface shoe.
The RX1 features a newly-developed multi-interface shoe that dramatically expands the camera's compatibility with a variety of accessories and raises its potential for photo and movie shooting. Available accessories include a powerful external flash unit, electronic viewfinder, optical viewfinder, thumb grip and clip-on LCD monitor.