I have recently bought a Nikon D 800 Camera I also own a Nikon D5100 Camera. On my D5100 I can point the camera at a light, exposure will adjust, I can press the autoexposure lock button and the camera will lock the exposure I can move the camera and point at anything and the exposure will stay locked so long as I hold the button. On the D800 this does not work. I have pressed and held the button and simultaneously half held the shutter button and the exposure will not lock I've looked online I've checked the settings I cannot figure this out. Can anyone tell me how to properly use the autoexposure lock button on a Nikon D 800 Camera?
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