EOS 6D is the world's lightest* full-frame DSLR equipped with a 20.2 megapixel CMOS sensor with precision 11-point AF system and also offers built-in WiFi and GPS support.
Lightest full-frame DSLR as of 13 September 2012, a Canon survey.
There is also a 6D variant model without built-in WiFi and GPS.
20.2-megapixel full-frame sensor
High resolution 20.2-megapixel images of superb quality and detail are attained from Canon's cutting-edge full-frame CMOS sensor technology. New photodiode construction, gapless microlens array and on-chip noise reduction circuitry on the CMOS keep image data clean and clear even at high ISO settings and long exposures, so your photographic vision is never compromised.
ISO expandable to 102400
No matter your exposure requirements, the EOS 6D allows flexible ISO speed settings of ISO 100 - 25600 and expandable to L: ISO 50, H1: 51200 and H2: 102400 to adjust the camera's sensitivity to light. From low light indoor environments to the great outdoors in broad daylight, the EOS 6D captures every picture in the best possible light.
Built-in WiFi and GPS
Built-in WiFi capability allows EOS 6D to connect to wireless networks at high speeds, allowing it to transfer data quickly to PCs and smartphones and print photos with PictBridge-enabled wireless printers.
EOS Remote, a Smartphone app (iOS / Android), takes advantage of EOS 6D WiFi capabilities by allowing smartphones to control it, allowing users to browse and download images, change shooting modes, adjust focus and even snap a photo.
High sensitivity, high precision built-in GPS in EOS 6D allows users to tag images with GPS coordinates, recall shooting locations and even route travelled with its logging function.