Olympus i-SPEED 2, Instructions Manual

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Software reference (CDU) i--SPEED 2
77
i
--SPEED LT,
i
--SPEED 2
18.
Timelapse mode
In addition to its normal function as a high speed video camera, the
Olympus
i
-- SPEED 2 is able to operate as a timelapse camera. In
timelapse mode, operation is similar to normal mode, with a few
necessary exceptions.
The normal trigger functions, ROC, BROC and the data logger
functions are not available, so the Live Set--up menu is deleted.
The speed is expressed either as frames per second or seconds
per frame, depending on the speed chosen. The shutter is
expressed in time, rather than shutter ratio. Speed and angular
velocity measurement are not available.
7.2 Measurement system
The Olympus
i
-- SPEED 2 camera has a built--in measurement
system which is based on the principle of comparative
measurement whereby measurement is achieved by entering the
size of a known object in the image and then comparing this with
the size to be measured.
The measurement suite is intended to give a good indication of
relative object distance, speed and angle. However, due to the
number of variable factors involved, no guarantee of measurement
accuracy can be given.
IMPORTANT : The entire reference measurement and the entire
measurement of interest must be coplanar, in a plane orthogonal to
the axis of the camera.
This means that for distance and speed measurements, the scene
must contain an object whose size is accurately known. Also, this
object must be the same distance from the lens as the object being
measured.
Furthermore, the start and end points of the known measurement
and the start and end points of the measurement of interest must all
be the same distance from the camera. For angle and angular
velocity measurements, the origin, start and end points of the
measurement must all be the same distance from the camera.
The accuracy of measurement depends on the conditions above
being fulfilled and on the skill of the operator in placing the on
screen cursors accurately.