AF sensors

[Dan Woodward]

Hi every one

Trying to understand the AF system on the Canon 7D. 1. Do the AF points in the viewfinder represent all of the AF sensors in the camera. 2. Are some of the sensors f 5.6 & some f 2.8 (I think the f 5.6 sensors are for fast tracking while the f 2.8 sensors are for focusing precision) 3. If my assumption is correct, which AF point or points are the f 2.8 sensors. Your help is appreciated. Thanks Dan

[Peter Hawrylyshyn]

Dan
You may find the following white paper helpful
http://www.usa.canon.com/dlc/control...articleID=3049

All 19 AF sensors are standard precision cross-type AF sensors for up to f5.6 lenses

The centre AF sensor also has a separate pair of diagonal high-precision line sensors for greater AF precision with lenses f2.8 or faster

[Dan Woodward]

Peter
Thank you so much for your help. I was completely misinterpreting what i was reading. Everything is clear now. Article you mentioned is very infomative as well. Would recomend the read to any one new to the 7D who wishes a clear understanding of this new system
Thanks again Dan

[Kurtis Diffenbaugh]

Hey Dan,
You might find these videos helpful also: http://www.usa.canon.com/dlc/control...articleID=3167

[Dan Woodward]

Kurtis
Yes Very helpfull. New to internet and fairly new to computer so input from you guys is great. Sharing your knowledge and experience with the eager to learn makes this a classy site. Glad I joined.
Thanks Dan

[Christopher C.M. Cooke]

I heartily recommend both sites to all 7D users as a Manual Dyslexic it managed to penetrate my befuddled brain and I seen de lite.