The Canon 6D is weather-resistant with dust and drip-proof seals, but it is not waterproof. It can handle light mist or humid conditions but should not be submerged or used in heavy rain without a protective cover.
No, the Canon EOS 6D is a full-frame camera and is only compatible with Canon EF mount lenses. EF-S lenses designed for crop-sensor cameras cannot be mounted on this body.
Using the LP-E6 battery, the Canon 6D is rated for approximately 1,090 shots per charge according to CIPA standards. Battery life may decrease when using the built-in Wi-Fi or GPS features.
No, the Canon EOS 6D is limited to Full HD (1080p) video recording at up to 30 frames per second. It does not support 4K resolution.