Canon eos5d User Manual download pdf (Page 44)

AF Microadjustment

positioned next to the left of the power switch on the camera back. Via the Custom

Function menu, you can assign a variety of controls to that button (as you could on the

EOS 40D’s Jump button) including LCD Brightness, Image Quality, Exposure

Compensation/AEB, Image Jump and Live View Function settings.

Previously, some Live View settings were made in the Set-up Menu, and some in the camera’s

Custom Function menu. For easier operation, both the EOS 50D and EOS 5D Mark II now

have all relevant Live View settings in one place in the Set-up Menu—there’s no need to

access Custom Functions.

Both models now feature an improved version of the AF Microadjustment custom function

(C.Fn III-8 on the EOS 5D Mark II and C.Fn III-7 on EOS 50D) previously found in the

flagship EOS-1Ds Mark III and the EOS-1D Mark III cameras. This powerful tool allows you

to fine-tune the focus precision when individual lenses are used, or apply an overall correction

that’s used with all lenses. In the past, this required sending a specific lens and camera to a

Canon Service Center. Now, with this tool, you can make fine adjustments to your camera’s AF

system for slight focus variations that may occur as lens mechanisms wear, or to compensate for

variations in tolerances. Correction data for up to 20 lenses, including the kit lens, can be stored

in the camera. To make room for other lenses, these can be deleted individually as necessary.

Using AF Microadjustment requires taking a series of test shots with the camera focused on

a precise subject, with foreground and background clearly visible. Shooting test images with

different Microadjustment values, it’s possible to select which setting gives the best results

after viewing the images at 100% in your computer. You then set that value up to +/- 20,

using the AF Microadjustment Custom Function screen.

In the Microadjustment custom function window, you can choose to correct focus for all lenses

or individual lenses. For either, pressing the INFO button brings you to a second screen with

a +/- 20 analog scale. Here’s where the focus locking position of the lens can be adjusted for-

ward or backward in up to 20 fine increments in either direction.

The amount of adjustment for one step varies based on the maximum aperture of the lens.

When saved, the camera’s autofocus system will continue to operate in normal fashion, but

the precise plane of sharpest focus will be moved forward or backward based on the AF

Microadjustment settings. The adjustment information for a lens (or camera) can be disabled

or easily readjusted, and does not apply to other cameras using the same lens.

V. CONTROLS AND CONVENIENCE

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Canon eos5d User Manual Page 44