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• With the EOS-3, using a Laser Matte focusing
screen will enable AE metering at all
magnifications from 1× to 5×.
• Using aperture-priority AE (Av) or Manual (M)
picture-taking modes are recommended as it is
easy to adjust depth of field and exposure in
these modes.
Setting the Exposure
Effective f-number for the Magnification and
Camera’s f/No.
For Cameras Displaying Stops
1
3
f-number 1× 2× 3× 4× 5×
2.8 5.6 8.4 11.2 14 16.8
3.2 6.4 9.6 12.8 16 19.2
3.5 7 10.5 14 17.5 21
481216 20 24
4.5 9 13.5 18 22.5 27
51015202530
5.6 11.2 16.8 22.4 28 33.6
6.3 12.6 18.9 25.2 31.5 37.8
7.1 14.2 21.3 28.4 35.5 42.6
81624324048
91827364554
10 20 30 40 50 60
11 22 33 44 55 66
13 26 39 52 65 78
14 28 42 56 70 84
16 32 48 64 80 96
• With the EOS-1 and EOS-1N/DP/HS, fine spot
metering cannot be used because an exposure
error will result.
• During remote control shooting, etc., when you
take your eye off the eyepiece, cover the
eyepiece with the eyepiece shutter or cover.
Otherwise, stray light may enter the eyepiece
and affect the proper exposure reading.
For Cameras Displaying Stops
1
2
f-number 1× 2× 3× 4× 5×
2.8 5.6 8.4 11.2 14 16.8
3.5 7 10.5 14 17.5 21
481216 20 24
4.5 9 13.5 18 22.5 27
5.6 11.2 16.8 22.4 28 33.6
6.7 13.4 20.1 26.8 33.5 40.2
81624324048
9.5 19 28.5 38 47.5 57
11 22 33 44 55 66
13 26 39 52 65 78
16 32 48 64 80 96
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