I have been trying to master Back Button Focusing, quite honestly my camera has been in it for 3 or so years. All of which I have been unsure as to how and why it is supposed to give you the sharpest possible pictures. (I have yet to find that to be true-sigh) I also recently enrolled in a course through Better Photography for my Nikon D7000 camera. In the notes the instructor made mention that Matrix metering is not ideal for BBF. I asked him about it and this is what he wrote me back: "Hi Stacy, Matrix metering takes a number of factors into account when calculating the exposure, including the scene brightness, the scene's contrast level, colours and information from the autofocusing system; therefore if you meter using Matrix from one scene and then lock the exposure using the AE-L feature before re-composing to shoot an alternative scene you may well find that the exposure for the second scene is not accurate. The AE-L feature works most reliably with either Spot, or Center-weighted metering,as these do not integrate information from the autofocusing system, and they are not colour sensitive." Do you all agree with this and find it to be true? I also still struggle what "re-compose" the shot means. Can someone hear explain? Thanks! Help me Learn! In my Bag: Nikon D7000, , Sigma 17-70mm, Sigma 17-200mm f2.8, Nikon 50mm 1.4G, Nikon 80mm 1.8, Nikon 40mm macro. Nikon 85mm, Lightroom and PSE14 "How people treat you is their Karma; how you react is yours."