Ok, I'm inside a cave and then I want to use the Spot Metering on my Nikon DSLR to make the entrance of the cave bright and the interior of the cave (where I am) dark. Then, after locking exposure to the cave entrance, I want to recompose and move the cave entrance to the side of the frame.
My question is that, does half-pressing the shutter locks exposure as well as focus just like what holding down the AF-L/AE-L button does?
>>> Nikon: Shutter half-press vs AF-L/AE-L button?