Yes, the Nikon D810 features a robust magnesium alloy chassis with extensive weather and dust sealing, making it suitable for professional use in harsh outdoor environments.
No, the D810 does not have native Wi-Fi. Wireless file transfer requires external accessories like the Nikon WT-5A or UT-1 communication units.
The Nikon D810 is highly efficient, rated for approximately 1,200 still images or 40 minutes of movie footage per charge using the EN-EL15 battery.
No, the Nikon D810 is limited to Full HD (1080p) video recording at up to 60fps. It does, however, offer uncompressed HDMI output for external recorders.