Manual Flash Photography - FujiFilm EF-42 Owner's Manual

Manual Flash Photography

Manual fl ash control is unaff ected by refl ections, making it the ideal
choice for pictures of highly refl ective or unrefl ective subjects.
1
Turn the camera and fl ash on.
2 Choose from the
length format displays.
3 Adjust exposure compensation. Choose higher values to increase
fl ash output, lower values to decrease.
4 Adjust zoom. Note that if
entire subject if zoom less than the focal length of the lens.
5
Adjust fl ash output by choosing a power ratio (PR) and confi rm
that appears in the display.
6 Settings are complete when the red backlight turns off and the
icon for the selected setting stops blinking. Wait for the ready
lamp to light before taking photographs.
(APS-C) or (35 mm) focal
is selected, the fl ash not light the
■ Eff ective Range
The eff ective shooting range of the fl ash in meters can be calculated
by multiplying the guide number by the sensitivity (ISO) coeffi cient
and dividing by the aperture (for feet, multiply the result by 3.28).
Flash range = guide number × ISO coefficient ÷ aperture (f-number)
The guide number varies with fl ash output and lens focal length.
24/16 24/16
1 1 / / 1 1 27
1 1 / / 2 2 19
1 1 / / 4 4 14
Power Power
1 1 / / 8 8 10
ratio ratio
1 1 / / 16 16 7
1 1 / / 32 32 5
1 1 / / 64 64 3
The ISO coeffi cient is shown in the table below.
ISO 100 ISO 100 ISO 200 ISO 200
1 1.4
For example, the range for a power ratio of 1
35 mm, an aperture of f/4, and a sensitivity of ISO 400 is 10 (the guide
number) × 2 (the ISO coeffi cient) ÷ 4 (the aperture), or in other words
5 m (16.4 ft.).
R The bar graph in the fl ash unit display shows the range at which optimal
exposure will be achieved; distances over 32 m (105 ft.) are shown by .
ENGLISH
Focal length in mm (35 mm format/APS-C) Focal length in mm (35 mm format/APS-C)
28/19 28/19 35/24 35/24 50/34 50/34 70/48 70/48
30 32 35 38
21 23 25 27
15 16 18 19
11 11 12 13
8 8 9 10
5 6 6 7
4 4 4 5
ISO 400 ISO 400 ISO 800 ISO 800 ISO 1600 ISO 1600
2 2.8 4
/ 8 and a focal length of
85/58 85/58 105/70 105/70
40 42
28 30
20 21
14 15
10 11
7 7
5 5
ISO 3200 ISO 3200
5.7
EN-10