I. CAMERA FEATURESAND OPERATION 12
shutter release simplyby pressing or lifting the thumb off the AE Lock button.
•C.Fn 4-2 keepsAF start on the shutter button, but allows the photographer to stop AF
temporarilyby pressing the AE Lock button. AE Lock isunavailable in this mode, but it
doesn’tmake any difference when the camera is set for manual exposure as it often is
for professionalsports photography.
•C.Fn 4-3 isalmost the same as C.Fn 4-1, except that there is no AE Lock. Thismode is
usefulwhen shooting sports photography in changing light situations, because it
updatesthe exposure automatically in AE modes as the subject moves from shadow
areasto sunlit areas or vice versa.
Custom Function 11allows the photographer to control which buttons and dials are
used to selectthe focusing points.
•C.Fn 11-0 (the default) initiates focusing point selection mode when the focusing
pointselector button is pressed. Focusing points can be scrolled horizontally with the
main inputdial, or vertically with the quick control dial.
•C.Fn 11-1 reverses the functions of the focusing point selector button and the
exposure compensation (+/-) button on top ofthe camera. In other words, the
exposure compensation (+/-) button initiatesfocusing point selection mode, and the
main and quickcontrol dials scroll the focusing points horizontally and vertically,
respectively. During photography, C.Fn 11-1 makesit quick and easy to adjust
exposure compensation byrotating the main dial while pressing the focusing point
selector button.
•C.Fn 11-2 also reversesthe functions of the focusing point selector button and the
exposure compensation button, butduring photography it allows you to use the Quick
ControlDial to scroll focusing points horizontally. Focusing points can be scrolled
verticallyby turning the Main Dial while pressing the Assist Button. AFPS is
unavailable in thismode, except when P.Fn-18 isactivated.
•C.Fn 11-3 reverses the functions of the focusing point selector button and the FEL
button. In thismode, the FEL button initiates focusing point selection mode, and the
main and quickcontrol dials scroll the focusing points horizontally and vertically,
respectively. The focusing pointselector button initiates the FEL preflash. With or
withoutflash, C.Fn 11-3 allows ambient exposure compensation to be adjusted with
the QuickControl dial during photography. C.Fn 11-3 is popular with photographers
who use FELextensively.
Custom Function 13controls the number of manually selectable focusing points, and it
also allowsthe photographer to link spot metering to an off-center focusing point.
•C.Fn 13-0 provides access to manual selection of all 45 focusing points and fixesspot
metering atthe center of the picture area, as marked by the circle at the center of the
focusing screen.
•C.Fn 13-1 reduces the number of manually selectable focusing points to 11; 3 in the
top row, 5 in the middle row, and 3 more in the bottom row. Spotmetering and Flash
Exposure Lockare linked to the manually selected focusing point in this mode. Fewer