What is the newest version of firmware for the Nikon D6? The changes from version 1.5 to 1.51 are as follows:

- Taking pictures with [Enable] selected for [Flicker reduction] > [Flicker reduction setting] in the [PHOTO SHOOTING MENU] and aperture stopped down using either a camera control to which depth-of-field preview was assigned or the aperture stop-down button on a PC lens would in rare cases cause the camera to stop responding with “Err” displayed in the top control panel and viewfinder.

- Double-tapping the display to cancel playback zoom would result in the monitor failing to turn off automatically following the delay selected for Custom Setting c4 [Monitor off delay] > [Playback] in the [CUSTOM SETTING MENU].

- Sliding the vibration reduction mode switch on an AI AF VR Zoom-Nikkor 80-400mm f/4.5-5.6D ED lens from “ON” to “OFF” would disable autofocus on the camera to which the lens was attached.