Much of my ability to photograph well has come from my recording of the camera / film / and lighting settings. In my early experiments with photography I learned that I could rely on that data on a regular basis. How I was able to get to the point of reaching those points of data perfection came from my being systematic in the way I would conduct my research; often times Bracketing my shots. Bracketing, means to shift to sequential F-Stop or Apature camera settings with each preceding shot took. If someone said to me that on his camera his best results were at F-9.5 at 1/250 Second, to Bracket would mean to shoot the same scene or image starting at F-9.5 for one image shot (using the same 1/250th shutter speed) and then in subsequent shots shift the F-Stop to F-11.0 and F-13.0, and then include F-8.0 and F-6.7 as well.

The Auto-Focus Technology in many camera models made accounts for the rest of the answer to the question of "How". The camera I use focuses the lens and then emits a "Beep" sound that lets me know that the camera now has a focused image. In developing technique and skill, I learned that photographing from the corner of an image would often give me the best shot; showing me the breadth and width of an image. The fact that I was legally blind (requiring me to bring a subject much closer or with a greater degree of magnification to see the image more adequately) only meant that in bringing an image up close in my photographs it seemed to transport my photographic work into the professional realm of photographers. To me, it simply looked better; and apparently to everyone else.