Canon EOS 80D (W), Basic Instruction Manual, Page: 124 / 308

Lenses and Usable AF Points
122
Autofocusing with only 27 points is possible. (Not possible with all 45
AF points.) Large Zone AF (manual selection of zone) cannot be
selected for AF area selection mode. During automatic AF point
selection, the outer frame marking the AF area (Area AF frame) will be
different from 45-point automatic selection AF.
: Cross-type AF point. Subject
tracking is superior and high-
precision focusing is achieved.
: AF points sensitive to horizontal
lines.
: Disabled AF points (not displayed).
Autofocusing is possible only with the center AF point.
: Cross-type AF point. Subject
tracking is superior and high-
precision focusing is achieved.
: Disabled AF points (not displayed).
Group G
Group H

If the maximum aperture is slower than f/5.6 (greater than f/5.6 but not
exceeding f/8), focus may not be achieved with AF when shooting low-
contrast or low-light subjects.

If the maximum aperture is slower than f/8 (greater than f/8), AF is not
possible during viewfinder shooting.