Canon autofocus system

In the many years that Canon has produced digital SLR cameras there has different variants of the autofocus system. Canon doesn't name their autofocus system, so it is only possible to group them together by AF points and each group most likely share the same autofocus modul, but there might be different minor versions. Here are the list:

7 AF Points

• Canon 10D
• Canon 300D
• Canon 350D
• Canon 1000D

9 AF points

• Canon 1100D
• Canon 20D
• Canon 30D
• Canon 550D
• Canon 400D
• Canon 450D
• Canon 500D
• Canon 550D

9 cross-type AF points

• Canon 40D
• Canon 50D
• Canon 60D
• Canon 650D
• Canon 600D

9-point AF (plus 6 Assist AF points)

• Canon 5D Mark II
• Canon 5D

11 points

• Canon 6D

19 cross-type AF points

• Canon 7D

45 AF points (Area AF)

• Canon 1D Mark II N
• Canon 1D Mark II
• Canon 1D
• Canon 1Ds
• Canon 1Ds Mark II

19 AF points (cross-type) and 26 Assist AF points (total 45 points)

• Canon 1D Mark III
• Canon 1D Mark IV
• Canon 1Ds Mark III

61 Point / 41 f/4 cross-type AF points inc 5 dual cross type

• Canon 1D-X
• Canon 1D-C
• Canon 5D Mark III

A couple of interesting things to note from this list. The Canon 5D Mark III is the first non professional camera to share autofocus sytem with the professional top models. This might be a new trend from Canon or they might just want to match what Nikon does. Canon really like the number 9 and 45 autofocus points. 15 cameras has 9 AF points and 8 cameras have 45 AF points. That is about 75% of the total list.

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