I. CAMERA FEATURESAND OPERATION 16
Combining
Custom Functions:
Advanced Operations
PersonalFunction 15 disables the AF-Assist beam of compatible EX-seriesSpeedlites.
Thiscan be helpful when working with other photographers, to prevent your AF-Assist
beam from appearing in their photos. The downside isthat you lose the benefits of the
AF-Assistbeam for your own photos.
PersonalFunction 16 allows the camera to fire automatically when autofocus is
achieved and the shutter button isfully depressed. This can be effective for handheld
macro photographyor when the camera is set for remote operation and waiting for the
subjectto come into the field of view. Remote operation can be achieved by using
Remote Switch RS-80N3 or Timer Remote Controller TC-80N3 with or withoutone or more
Extension Cord ET-1000N3 setsto release the shutter.
PersonalFunction 17 disables AFPS. This function can be convenient when you are
manuallyselecting focusing points near the edge of the Area AF ellipse but don’t want
the camera to switch to AutomaticFocus Point Selection mode.
PersonalFunction 18 enables AFPS when C.Fn 11-2 has been set. (AFPS is normally
disabled in C.Fn 11-2 asmentioned earlier.)
Asyou can see from reading the section on Custom Functions, there are a great many
C.Fnsthat relate to the navigation of the EOS-1 class 45-point Area AF sensor. Used
individuallythey can go a long way towards simplifying and easing the operation of the
camera. Asan example, C.Fn 4-1 (or, 4-3), where the rear (*) button is used to activate
the focusing system, isalmost universally accepted by professionalphotographers as
the bestway to shoot sports. But by combining this function with C.Fn 18-2 and
registering a Home Position (HP) with the AssistButton, it can be a much more valuable
and versatile tool.
We willlook at a few combinations and how they relate to different types of
photography. A combination that’suseful for sports may be frustrating for shooting a
wedding or event, whereasa different combination might be ideal for those
applications. Some combinationslend themselves better to photographers who shoot
in AI Servo AF, butothers make more sense for One-Shot AF. We willbegin by covering
the AssistButton.
AssistButton
Outof the box, the Assist Button really doesn’t do much and is often overlooked or not
recognized asthe very functional tool that it is. The key feature of the AssistButton is
thatyou can register it to do something (with Personal Function 6, for example, you can
use itto toggle back and forth between a pre-registered shooting mode and metering
pattern thatare different than the settings you are currently using). Here we will be
using itto pre-register either individual focusing points or AFPS. This pre-registered
focusing point(or AFPS) is called the Home Position (HP).
Assigning the Home Position (HP)