Body Elements

The D750's full-frame 24MP CMOS sensor is probably related to the one we've seen in the D610. Unlike Nikon's other recent DSLRs, the sensor in the D750 has an anti-aliasing filter.
The D750's built-in flash - with a guide number of 13m at ISO 100 - is on hand for snapshots, but it can also act as a commander for a group of external flashguns. Max sync speed is 1/200 sec.
The flash button serves a number of functions. It pops it up in P/A/S/M modes, adjusts the setting (auto, redeye, slow sync), and lets you set exposure compensation.

The bracket button just does as it sounds. The circle in between those two buttons is the receiver for an optional wireless remote.
The D750 has a lockable mode dial with the drive switch underneath. Despite being a pricey full-frame camera, Nikon hasn't forgotten the beginner crowd, offering a selection of scene modes.

The drive dial features continuous shooting, quiet mode, self-timer, and mirror lock-up.

This AF mode switch is now common across Nikon's high-end DSLRs. A simple AF/M toggle switches between automatic and manual focus, and the textured button at its hub brings up an AF sub-menu on the top LCD allowing you to choose from the D750's various autofocus modes (in combination with the front and rear command dials).

The D750's viewfinder specification is identical to that of the D810 - 100% coverage with FX lenses and 0.7x magnification. In DX or 1.2X crop mode the coverage drops to 97%.

The recangular rubber eye-cup is a minor point of differentiation - Nikon's high-end DSLRs offer a circular eyepiece and a built-in viewfinder blind.
At the center here is the eight-way controller, which is used for menu navigation and directly setting the focus point. The OK button can do a few things other than reset the focus point, such as zooming in to a specific magnification and location in playback mode.

The info button turns the rear status display on the LCD on and off.
Below the eight-way controller is the switch for moving between the video and still shooting modes. The button at the center toggles live view when in still shooting mode.

Other items here include the speaker, card write lamp, and the rear IR receiver.
The D750 records images to twin SD cards. If you install two memory cards you can set them up as backup, overflow, or send movies to one and still images to the other.
As well as the usual accessory port and USB (2.0) / HDMI outlets the D750 features 3.5mm sockets for headphones and an external microphone.
The D750 uses the same EN-EL15 battery as the D810 and D7100, which is good news for anyone considering it for use alongside either camera (or upgrading from DX). Battery life (CIPA standard) is a quoted 1230 shots per charge.