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Custom Function 19

What Is It?

The ultra telephoto L-series Canon IS lenses, launched in July 1999, have a new function called "AF Stop" with four "AF Stop" buttons on the lens. The EOS 3 can use these new AF Stop buttons for other functions by setting CF19 (custom function). CF19 is, however, not incorporated into the cameras as shipped from the factory, so the setting must be done at Canon service facilities.

Custom Function 19 Details:

CF19-0...By hitting the AF stop button on the lens you will stop the AF drive.

CF19-1...By hitting the AF stop button on the lens you will activate the AF drive.

CF19-2...By hitting the AF stop button on the lens you will activate AE lock.

CF19-3...By hitting the AF stop button on the lens you will activate a change in focusing point selection, I.E., you can switch to manual or auto or eye control.

CF19-4...By hitting the AF stop button on the lens you will be able to select the AF mode by changing from one-shot AF to AI servo or vise-versa.

U.S. Factory Service Center Locations

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Canon Factory Service Center

100 Jamesburg Road Jamesburg,

NJ 08831 (732) 521-7000

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Canon Factory Service Center

15955 Alton Parkway

Irvine, CA 92618

 (949) 753-4200

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Concepts: Camera, Photographic lens, Button

Entities: lenses, U.S., AF, Michael Reichmann

Tags: af stop, af stop button, AF drive, new af stop, custom function, one-shot af, AF mode, telephoto l-series canon, function 19 details, Canon service facilities, Factory Service Center, AE lock, new function, AI servo, point selection, eye control, L-series, ultra, cameras