Flash Range; External Fl Ash Shooting - Olympus E-PL2 Instruction Manual

Flash range

Flash range can be calculated as shown below.
Flash range (m) =
GN (ISO200)
Depending on fl ash output, the Guide Number (GN) may be from 1.4 (minimum) to
10 (FULL).
ISO sensitivity factor
ISO sensitivity factor (K)
Aperture (f-number)
Aperture can be set to values between the maximum aperture for the lens and f/22.
Check the maximum aperture for the lens.
Minimum range
The lens may cast shadows over objects close
to the camera, causing vignetting, or be too
bright even at minimum output.
• Use optional off-camera fl ash units to prevent vignetting. To prevent photographs
from being overexposed, select mode A or M and choose a high f-number, or
reduce ISO sensitivity.
External fl ash shooting
With this camera, you can use one of the separately sold external fl ash units to
achieve a fl ash suited to your needs. The external fl ashes communicate with the
camera, allowing you to control the camera's fl ash modes with various available
fl ash control modes, such as TTL-AUTO and Super FP fl ash.
An external fl ash unit specifi ed for use with this camera can be mounted on the
camera by attaching it to the camera's hot shoe. You can also attach the fl ash to
the fl ash bracket on the camera using the bracket cable (optional). Refer to the
documentation provided with the external fl ash units as well.
Functions available with external fl ash units
Optional fl ash Flash control mode
FL-50R
TTL-AUTO, AUTO, MANUAL,
FL-36R
FP TTL AUTO, FP MANUAL
FL-20
TTL-AUTO, AUTO,
FL-14
MANUAL
RF-11
TTL-AUTO, MANUAL
TF-22
* The focal length of the lens that can be used (Calculated based on 35 mm fi lm camera).
GN (ISO 200) × ISO sensitivity factor
Aperture (f-number)
ISO sensitivity (x)
200 400 800
1.0 1.4 2.0
GN (Guide number)(ISO100) RC mode
GN50 (85 mm*) GN28 (24 mm*)
GN36 (85 mm*) GN20 (24 mm*)
GN20 (35 mm*)
GN14 (28 mm*)
GN11
GN22
1600 3200 6400
2.8 4.0 5.6
Approximate distance at
Lens
which vignetting occurs
14 – 42 mm
17 mm
40 – 150 mm
14 – 150 mm Flash can not be used
X
K =
200
0.35 m
0.25 m
1.0 m
11
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EN 105