Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 580)

580
Fine Adjustment of AF Position (AF Microadjustment)
o When shooting with the intermediate range (focal length) of a zoom lens, the
AF’s point of focus is corrected automatically relative to the adjustments made
for the wide-angle and telephoto ends. Even if only the wide-angle or telephoto
end is adjusted, a correction will be made automatically for the intermediate
range.
Clearing All AF Microadjustments
When [ Clear all] appears at the bottom of the screen, pressing the <
L
>
button will clear all the adjustments made for [1:All by same amount] and
[2:Adjust by lens] .
Cautions for AF Microadjustment
o The AF’s point of focus will vary slightly depending on the subject conditions,
brightness, zoom position, and other shooting conditions. Therefore, even
if you perform AF Microadjustment, focus may still not be achieved at the
suitable position.
o The adjustment amount of one step varies depending on the maximum
aperture of the lens. Keep adjusting, shooting, and checking the focus
repeatedly to adjust the AF’s point of focus.
o The adjustment will not be applied to AF in Live View shooting or movie
recording.
o The adjustments will be retained even if you do [ 8 : Clear all Custom Func.
(C.Fn)] ( = 581). However, the setting will be [0:Disable] .
o To check adjustment results, focus with One-Shot AF.
Notes for AF Microadjustment
o It is best to make the adjustment at the actual location where you will shoot.
This will make the adjustment more precise.
o Using a tripod when making the adjustment is recommended.
o For making adjustments, shooting at the
73
image-recording quality is
recommended.