The Canon PowerShot G3 X is a large sensor digital bridge camera announced by Canon on June 18, 2015. It marks Canon's entry into this product category, alongside competitors such as the Panasonic Lumix DMC-FZ1000, Sony Cyber-shot RX10 and RX10 II.
It has the longest focal length zoom range of any Powershot G-Series, from 24-600mm (35mm equivalent) with a maximum aperture of f/2.8 at widest, decreasing to f/5.6 at 600mm. In terms of overall specification it is the most capable of the current-production G-series cameras but this comes at the expense of overall size and weight - it is also the largest and heaviest of the series.
It shares the same 1.0-type ("1-inch") sensor found in the Canon G7 X as well as both the Sony RX100 III and Sony RX10 cameras.
Features 3.5mm microphone jack for external microphones or recorders. 3.5mm jack for headphones PAL/NTSC video output 3:2 aspect ratio LCD monitor, 1.62 million dots Live view mode Built-in flash Auto, Continuous, Servo AF and Manual Focus modes Internal monaural speaker, stereo microphone Three metering modes, Evaluative, Center Weighted Average & Spot ±3 stops in 1/3-stop increment Exposure Compensation, dedicated dial sRGB colour space ISO 125–12,800 Continuous drive up to 5.9 frame/s SD, SDHC, and SDXC memory card file storage Raw and large, superfine JPEG simultaneous recording USB 2.0, HDMI control (CEC) Approximate weight with battery and card NB-10L battery, rated at approx. 300 shots in normal usage/400 shots in ECO mode
Comparison
The Canon PowerShot G3 X offers the largest zoom range of all large sensor bridge cameras (tied with the Sony RX10 III and IV), while being the smallest and lightest in the category. The G3 X is over 30% smaller and lighter than its Sony counterparts.
The size and weight savings are achieved with a smaller aperture at the telephoto end of the zoom range and by making its electronic viewfinder an optional accessory.
See also List of large sensor fixed-lens cameras List of bridge cameras
References
http://www.dpreview.com/products/canon/compacts/canon_g3x/specifications