Guide number in Auto FP High-Speed Sync (ISO 100, m/ft)
Flash output |
|
|
|
|
| ||
level | 14* | 24 | 28 | 35 | 50 | 70 | 85 |
|
|
|
|
|
|
|
|
M1/1 | 3.9/12.7 | 7.2/23.6 | 7.8/25.5 | 9.0/29.5 | 10.2/33.4 | 11.4/37.4 | 12.0/39.3 |
|
|
|
|
|
|
|
|
M1/2 | 2.7/9.0 | 5.0/16.7 | 5.5/18.0 | 6.3/20.8 | 7.2/23.6 | 8.0/26.4 | 8.4/27.8 |
|
|
|
|
|
|
|
|
M1/4 | 1.9/6.3 | 3.6/11.8 | 3.9/12.7 | 4.5/14.7 | 5.1/16.7 | 5.7/18.7 | 6.0/19.6 |
M1/8 | 1.3/4.5 | 2.5/8.3 | 2.7/9.0 | 3.1/10.4 | 3.6/11.8 | 4.0/13.2 | 4.2/13.9 |
|
|
|
|
|
|
|
|
M1/16 | 0.9/3.1 | 1.8/5.9 | 1.9/6.3 | 2.2/7.3 | 2.5/8.3 | 2.8/9.3 | 3.0/9.8 |
|
|
|
|
|
|
|
|
M1/32 | 0.6/2.2 | 1.2/4.1 | 1.3/4.5 | 1.5/5.2 | 1.8/5.9 | 2.0/6.6 | 2.1/6.9 |
|
|
|
|
|
|
|
|
M1/64 | 0.4/1.5 | 0.9/2.9 | 0.9/3.1 | 1.1/3.6 | 1.2/4.1 | 1.4/4.6 | 1.5/4.9 |
|
|
|
|
|
|
|
|
M1/128 | 0.3/1.1 | 0.6/2.0 | 0.6/2.2 | 0.7/2.6 | 0.9/2.9 | 1.0/3.3 | 1.0/3.4 |
|
|
|
|
|
|
|
|
*With the
•The guide number in Auto FP
•The guide number in Auto FP
ISO sensitivity factors
For sensitivities other than ISO 100, multiply the guide number by the factors shown in the table below.
ISO | 25 | 50 | 100 | 200 | 400 | 800 | 1600 |
|
|
|
|
|
|
|
|
Factors | 0.5 | 0.71 | 1 | 1.4 | 2 | 2.8 | 4 |
Other functions
49