Canon EOS 7 Service Manual page 70

(5) Eye Control Response Time
The 32-bit RISC microcomputer improves the processing performance and the
improved Eye Control algorithm increases the processing speed. The EOS ELAN 7 E
/ EOS 30's Eye Control response time is less than half the EOS Elan II E/50 E/55's.
The response time during the calibration procedure is also shorter.
Camera orientation
detection switch 1
Camera orientation
detection switch 2
Fig. 2-5 Camera Orientation
Detection Switch
Orientation/Eyeglass Use
Right Side Up
Horizontal
Upside Down
Grip Upward
Vertical
Grip Downwar
Table 2-1 Camera Orientation and IRED Illumination
EOS A2/A2E/5
EOS ELAN II E/
EOS 50 E
EOS IX E
EOS-3
EOS ELAN 7 E/
EOS 30
50
fast
Fig. 2-6 Eye Control Response Time
Without Eyeglasses
Lower IREDs Upper IREDs
IR-1, IR-2 IR-3, IR-4
IR-3, IR-4 IR-1, IR-2
IR-1, IR-4 IR-2, IR-3
IR-2, IR-3 IR-1, IR-4
2-3
Part 2: Technical Information
120
65
55
100 150
With Eyeglasses
Lower IREDs Upper IREDs
IR-5, IR-6 IR-7, IR-8
IR-7, IR-8 IR-5, IR-6
IR-5, IR-8 IR-6, IR-7
IR-6, IR-7 IR-5, IR-8
220
200 (ms)
slow