Olympus E-3 User Guide

54
Guide number of flash
Aperture set on lens
As an example, if you were using the FL 36R flash which has a
guide number of 36 in meters at ISO 100, and you wanted to
shoot with an aperture of f=11, your maximum shooting distance
would be: 36/11=3.2 meters.
The same calculation on the FL 50R would yield the following
result: 50 (Guide number in m at ISO100)/11=4.54 meters
The built-in unit of the E-3 has a guide number of 13, thus at
f=11 you would have an operating range of 1.2 m (approx). The
above results, however, are the theoretical limits when there is
no other lighting present.
POWER USER TIP: If you set the camera to use AUTO ISO when
using a TTL flash unit (or the built-in unit) the camera will automatically
adjust the ISO to compensate for out of range images. This, in effect,
multiplies the effective guide number of the flash unit in use to increase
the practical working range and avoids slight under-exposure if working
at the or near the theoretical maximum of the TTL flash unit in use.
TTL FLASH
Luckily, the E-series cameras incorporate the famous TTL
( Through The Lens/Off the Film/Image Sensor ) flash exposure
system pioneered by Olympus. This adds considerably to the
available theoretical range when shooting with additional ambient
light sources.
The camera incorporates a sensor in the base of the mirror box.
This measures the illumination being reflected from the subject
during the actual exposure. The central computer then cuts-off
the illumination of the flash unit once the main motif has been
correctly exposed.

Olympus E-3 Specifications

General

Megapixel	10.1 MP
Sensor type	CMOS
Image stabilizer	Yes
Image sensor size	4/3 \
Supported aspect ratios	4:3
Maximum image resolution	3648 x 2736 pixels
Digital zoom	0 x
Optical zoom	5 x
Interface	USB
Power source	BLM-1
Video capability	No
Camera shutter speed	1/8000 - 60 s
Display diagonal	2.5 \
Magnification	1.15 x
Product color	Black
Image editing	resizing, rotating
Photo effects	black&white, Sepia
White balance	auto, Cloudy, custom modes, daylight, Fluorescent, Tungsten
Camera playback	Slide show
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	10 - 90 %
Operating relative humidity (H-H)	30 - 90 %
Compatible memory cards	xd
Light metering	centre-weighted, spot
Light exposure modes	aperture priority AE, auto, manual, shutter priority AE

Weight and Dimensions

Depth	74.5 mm
Width	142.5 mm
Height	116.5 mm
Weight	810 g