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40D nie ma 5,6 przypadkiem? Jak nie to sorka

40D
• 9-point TTL CMOS sensor
• Points cross-type for F5.6 or faster lens
http://www.dpreview.com/reviews/CanonEOS40D/

7D
• TTL-CT-SIR CMOS sensor
• 19 cross-type AF points (f/2.8 at centre)
• Center point additionally sensitive with lenses of F2.8 or faster
• AF working range: -0.5 - 18 EV (at 23°C, ISO 100)"
a to ze strony Canona

19-point all cross-type AF (f/2.8 at center: Dual Cross Sensor)