Canon EOS-1D C EOS 1D X Instruction Manual - Page 81
Group G, Group H
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Lenses and Usable AF Points Group G Only 33 of the 61 AF points can be used for autofocusing. All of the AF area selection modes are selectable. During automatic AF point selection, the outer frame marking the AF area (Area AF frame) will be different from 61-point automatic selection AF. : Cross-type AF point. Subject tracking is superior and highprecision focusing is achieved. : AF points sensitive to horizontal lines. : Disabled AF points (not displayed). EF180mm f/3.5L Macro USM EF180mm f/3.5L Macro USM + Extender EF1.4x EF1200mm f/5.6L USM Group H Only the AF point at the center of the viewfinder, and the surrounding AF points (above, below, on the right and on the left) can be used for autofocusing. Only the following AF area selection modes are selectable: Single-point AF (Manual selection), Single-point Spot AF (Manual selection), and AF point expansion (Manual selection ). : Cross-type AF point. Subject tracking is superior and highprecision focusing is achieved. : AF points sensitive to horizontal lines (on the right and on the left of the center AF point) or vertical lines (above and under the center AF point). Manual selection is not possible. Only available when "AF point expansion (Manual selection )" is selected. : Disabled AF points (not displayed). EF35-105mm f/4.5-5.6 EF35-105mm f/4.5-5.6 USM 81
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