Canon 550EX Camera Accessories User Manual


 
121
Specifications
Guide No.
[Normal Mode] (At ISO 100 in meters)
[High-Speed Sync (FP Flash) ]
Flash Coverage (mm) 17 24 28 35 50 70 80 105
Normal (full) Flash Guide No. 15 28 30 36 42 46 50 55
Quick Flash Same as for manual flash from 1/2 to 1/6.
1/1 15 28 30 36 42 46 50 55
1/2 10.6 19.8 21.2 25.5 29.7 32.5 35.4 38.9
1/4 7.5 14 15 18 21 23 25 27.5
1/8 5.3 9.9 10.6 12.7 14.8 16.3 17.7 19.5
1/16 3.8 7 7.5 9 10.5 11.5 12.5 13.8
1/32 2.7 4.9 5.3 6.4 7.4 8.1 8.8 9.7
1/64 1.9 3.5 3.8 4.5 5.3 5.8 6.3 6.9
1/128 1.4 2.5 2.7 3.2 3.7 4.1 4.4 4.9
Manual Flash Guide No.
Shutter Speed
Flash Coverage (mm)
17 24 28 35 50 70 80 105
1/125 10.6 19.8 21.2 25.2 29.7 32.5 35.4 38.9
1/160 9.4 17.5 18.8 22.5 26.3 28.8 31.3 34.4
1/180 8.8 16.5 17.7 21.2 24.7 27.1 29.5 32.4
1/250 7.5 14.0 15.0 18.0 21.0 23.0 25.0 27.5
1/320 6.6 12.4 13.3 15.9 18.6 20.3 22.1 24.3
1/350 6.3 11.8 12.7 15.2 17.7 19.4 21.1 23.2
1/400 5.9 11.1 11.9 14.2 16.6 18.2 19.8 21.7
1/500 5.3 9.9 10.6 12.7 14.8 16.3 17.7 19.4
1/640 4.7 8.8 9.4 11.3 13.1 14.4 15.6 17.2
1/750 4.3 8.1 8.7 10.4 12.1 13.3 14.4 15.9
1/800 4.2 7.8 8.4 10.1 11.7 12.9 14.0 15.4
1/1000 3.8 7.0 7.5 9.0 10.5 11.5 12.5 13.8
1/1250 3.4 6.3 6.7 8.0 9.4 10.3 11.2 12.3
1/1500 3.1 5.7 6.1 7.3 8.6 9.4 10.2 11.2
1/1600 3.0 5.5 5.9 7.1 8.3 9.1 9.9 10.9
1/2000 2.7 4.9 5.3 6.4 7.4 8.1 8.8 9.7
1/2500 2.4 4.4 4.7 5.7 6.6 7.3 7.9 8.7
1/3000 2.2 4.0 4.3 5.2 6.1 6.6 7.2 7.9
1/3200 2.1 3.9 4.2 5.0 5.9 6.4 7.0 7.7
1/4000 1.9 3.5 3.8 4.5 5.3 5.8 6.3 6.9
1/5000 1.7 3.1 3.4 4.0 4.7 5.1 5.6 6.1
1/6000 1.5 2.9 3.1 3.7 4.3 4.7 5.1 5.6
1/6400 1.5 2.8 3.0 3.6 4.2 4.5 4.9 5.4
1/8000 1.3 2.5 2.7 3.2 3.7 4.1 4.4 4.9
(Multiply by 3.3 to convert to feet)
08. F073-E (99~) 02.4.1 2:16 PM Page 121