For one shot, once focus is achieved, as long as the focus button (AF on or Shutter button) is continued to be depressed, that focus is locked, allowing you to recompose.
CANON BG E2N BATTERY GRIP MANUAL MANUAL
The camera af-on button works as a default back button focus,įrom the manual On page 131 3rd bullet it states, that After achieving focus with on shot Af the image can be recomposed, and the focus is locked, therefore is the difference using servo ai.ĪF works differently for one shot and AI Servo modes. GEAR: 5DII, 7DII (x2), 7D(x2) some other cameras, various lenses & accessoriesįLICKR & all, love the camera, however can anyone explain back button focussing. It would make for a lot of missed focus shots, I'm afraid.īesides the camera, lens, settings and familiarity with your subjects, the other thing that's needed is practice, practice, practice! Early in the shooting season I don't get as low percentage of missed focus shots as I do later when I've been doing it a lot. I use Zone Focus occasionally too, but mostly for birds in flight, against a very distant background or clear sky.
CANON BG E2N BATTERY GRIP MANUAL SERIES
Gymkhana "Pole Bending" for example, where the horse and rider zig zag through a series of poles. Occasionally I'll use Expansion Points for some types of events, where the subjects change direction less predictably. I haven't shot dog agility, but do shoot some similar equestrian events. Part of getting a high success is knowing your subjects and what they are going to do. It's pretty rare that I think the camera and lens miss focus.
or sometimes I just press the wrong button with my thumb!. or I may to keep the AF point on the subject, where I want camera & lens to focus. For example, I might shoot too fast, before focus has been acquired. and I bet that at least half of those are my fault, not the camera's or lens'. I typically shoot between 10 images at an event and have less than 1% images that miss focus. The rest of the Canon cameras use their main processors for everything. Dual processors handle images separately. Like the 1D/1DX-series cameras, 7D-series use a discrete chip to run the AF system. I use a pair of 7D Mark II, which are excellent with active subjects. f/4 to f/8 aperture for added depth of field (minor focus error won't matter) USM lenses are the fastest to acquire and best tracking Single Point AF, manually selected (usually the center point) For action photography such as you describe I would use:
0 kommentar(er)
