Choosing the 5D mark iii over the D800

sdyue wrote:
ES-LPV = Exposure Simulation Live Preview (common on PowerShots w/ M)

ExpSim LV = EOS dSLR version of ES-LV (but also includes 'dof' preview; aperture stopped down OR 'full open' exposure simmed for a stopped down aperture.

really?

D800 front finger dial close to front grip (such that one can inadvertently make unwanted adjustments)

D800 rear thumb dial close to thumb rest (such that one can inadvertently make unwanted adjustments)

D800 dials? that 5DMkIII cannot do better/faster w/ their placement?
D800 buttons to do more of what? that 5DMkIII cannot do better/faster?

yes... speed, which

includes adjustment controls of speed/aperture/iso (w/o resorting to 'menu-only-screens' or 'top lcd screen')... if you've ever seen what ExpSim LV in full M/M-ISO is... you'd understand 'speed' of 'creative digital preview image control for exposure-sensitivity' well beyond anything that relied on TTL metering of non-ExpSim LV systems like D800/D700 and even non-LV like 5D.

'just' the grip 'feels good'...

5DMkIII grip is uncluttered, and top finger dial is ideal ergonomically that it allows the wrist to remain straight 'up' when holding the body grip w/ right hand when making adjustments. and just holding the body by the grip-thumbrest itself will never be prone to front or rear dial accidental adjustments. the large thumbwheel is placed ergonomically for optimal position for 'full circle spins'.

Nikon dSLR shooters have already complained about the shortcoming of a grip that is prone to unwanted adjustments even when merely carrying it 'off-grip' 'in bag' 'hanging on neck' etc.

assuming one still uses TTL metering sensors at all; given Canon has ExpSim LV which is done 'realtime evaluation' by the sensor itself, not the a separate 'metering' sensor. ExpSim LV especially in Full-M/M-ISO is unaffected by the non-image unrelated TTL sensor metering system (it is merely mirrored optical sensing; and any other extraneous light like OVF leak or anywhere else, like the lcd backlight)

since you are unfamiliar with ExpSim LV... just as CBS dSLR pro users are unfamiliar with it... (they didn't even know one could preview WB Temp K color adjustment 'live in realtime'... and were 'chimping' as though they had no live view at all... (i.e. for their live-view... they had ExpSim LV never 'enabled'... and probably haven't even see what it does in Full M/M-ISO)). i already have even 7D shooters telling me ExpSim LV doesn't really exist... and doesn't do anything 'sim' whatsoever. proof... they didn't even enable it either, and use it for 'full m/m-iso'.

meanwhile... on a Nikon FF D700/D800, one is still TTL metering sensor dependent whether using A/S/P or M, thus 'chimping' is still a norm for 'confirming' selected exposure-sensitivity done 'blind' is what one expects from one's 'meter reading' of various patches of lit surfaces (depending on which metering pattern one is using).

i'm only covering things you haven't because you may be unaware of; all the rest you mention is already covered by yourself because of your familiarity with them.

when you know what ExpSim LV can do... then you will realize along w/ its two primary EOS-1 controls (wheel/dial)... you can rapidly do a lot more with just those for the most often used parameter adjustments.

this is what ExpSim LV does...

and if one doesn't have it... and the D800/D700 never did; it's liveview preview shows only a 'neutral/std' autogain 'look' completely disconnected to speed-aperture-ISO. (and an lcd that has a 'color cast' problem is useless for color/wb/saturation preview)

in order for one to have ES-LV (Canon's ExpSim LV) on a Nikon, they only offer it on their dual-grip D3/D3x/D3s/D4 (and not lower, like DXXX models)