I’m learning to use the AF-ON
To take a picture, you point the camera at the subject and press the button – right? George Eastman built his company around the motto “You press the button, we do the rest”. More recent is the ongoing joke slogan about PHD cameras (“Push Here Dummy”).
The shutter button on many (most?) modern cameras actually has two “stopping points” or triggering positions. The first position is about halfway down. You can feel this first position by pressing the shutter button lightly and slowly. With a little practice, you can quickly get a feel for the effort and distance and the half-pressed button then comes quickly and naturally. The second position is the actual stopping point and is at the bottom of the shutter button stroke or press. The half-press has been my habit for a long time. It was especially useful with the G3 and G9 because those cameras had a very noticeable shutter lag unless the half-press technique was used. In addition to reducing shutter lag, the half-press was especially useful in the “focus, recompose, shoot” technique that I almost always use.
In addition to the two position shutter button, the 7D also has the AF-ON
In addition to focusing, the AF-ON
A good feature, AF-ON