Canon SPEEDLITE 270EX II Mode D'emploi page 28

Flash Shooting Range Guidelines (EF-S 18-55mm f/3.5 - 5.6 IS)
Flash head normal position
ISO
18mm
100 1-6.3 / 3.3-20.6
200 1-8.9 / 3.3-29.1
400 1-12.6 / 3.3-41.1
800 1-17.7 / 3.3-58.0
1600 1.5-25.1 / 4.9-82.6
3200 1.5-35.4 / 4.9-116.2
6400 2-50.3 / 6.6-164.9
As the periphery of the pictures becomes dark, do not use these focal lengths.
26
55mm
1-3.9 / 3.3-12.9
1-5.5 / 3.3-18.2
1-7.9 / 3.3-25.7
1-11.1 / 3.3-36.3
1-15.7 / 3.3-51.6
1-22.1 / 3.3-72.7
1-31.3 / 3.3-103.0
[Approx. m / ft.]
Flash head pulled forward
18mm
- 1-4.8 / 3.3-15.9
- 1-6.8 / 3.3-22.5
- 1-9.6 / 3.3-31.8
- 1-13.6 / 3.3-45.0
- 1-19.3 / 3.3-63.6
- 1-27.3 / 3.3-89.8
- 1.5-38.6 / 4.9-127.0
55mm