Canon EOS-1D/DS manual Selectable AF Point, AF Expansion With Selected Point

Selectable AF Point

This C.Fn allows you to reduce the number of available AF points, which in turn allows you to move more quickly from one point to the next. Similarly, if you find that you never use the inner or outer focusing points, you can use this C.Fn to disable one set or the other. Your available options include:

19 points

11 points (Mark II and IV models only)

Outer 9 points

Inner 9 points

Consider combining either of the last two settings with C.Fn IV-3-3 (Quick Control Dial—AF point selection). This will allow you to instantly change AF points with the Quick Control Dial without having to press the AF point selection button first. To instantly return to the center AF point, simple press in on the Multi-controller button. Note that when the Quick Control Dial is set to select AF points it won’t be available to adjust exposures. Instead, press the AF point select button and turn the Main Dial.

AF Expansion With Selected Point

A single AF point can be so small that it becomes difficult to keep centered on a fast-moving subject. The AF point expansion C.Fn programs the camera

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to automatically activate adjacent AF points and thereby expand the potential size of the AF area when necessary. EOS-1D/1Ds models allow you to add a left and right point, a ring of six surrounding points, or an expanded cluster of up to 18 points (EOS-1D Mark IV only), that can move around the whole 45-point area if necessary.

This function can be very useful with fast-moving subjects, especially those that lack enough texture or detail for the AF to latch onto. Keep in mind, however, that the larger the focusing area, the greater the chance that the camera may focus on something other than what you have in mind.

Switch to Registered AF Point

This C.Fn allows the camera to memorize the position of any AF point. You can then instantly return to the memorized point by pressing the Multi-controller button. This is a great feature for when you need

to quickly move from, for example, the center point to an outer point, or from a point you’ve chosen for horizontal shots to another point for verticals. To register an AF point:

1.Manually select an AF point you want memorized.

2.Hold down the AF point selection button and press the ISO button. “SEL HP” will appear on the top LCD panel and in the viewfinder to confirm that the camera has registered this point as a “Home Point."

There are two ways to instantly access your registered Home Point:

1.Press in on the Multi-controller. To return to your previous AF point, press in on Multi- controller again.

or:

2.Hold down the AF stop button on your lens (if it has one), then press the FE lock button. Repeat the procedure to return to

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the previous AF point. To use this method, you must first set C.Fn III-6-6 (AF stop button function/Switch to registered AF point).

Orientation Linked AF Point (EOS-1D Mk IV only)

This C.Fn allows you to pre-select separate AF points for vertical and horizontal orientation and instantly change AF points simply by turning the camera. You can even select the AF point you want to use in three different camera orientations: horizontal, vertical/grip on top, and vertical/grip on bottom.

It’s also possible to select different AF point select modes; for example, a single point for horizontals and Automatic AF point selection for verticals. If you clear the camera settings to their defaults, the selected AF points for the respective orientations will reset to the center AF point.

To activate this C.Fn:

1.Select option 1: “Select different AF points.”

2.Hold the camera horizontally and manually dial-in the AF point you want.

3.Turn the camera vertically and select a different AF point.

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