16
Adjustable Features
Lens Specifications are as follows:
Minimal Focal Distance: 16” (41cm)
Maximum Focal Distance: infinity.
Ability to see objects at a distance depends on object size and
ambient light conditions.
Angle of View: 12°
Field of View: 70’at 330’ distance (21 meters at 70 meter distance)
Magnification: 2.6 times
3. Infrared Emitter
You cannot adjust the intensity or light angle of the infrared emitter. The emitter casts a
12° angle of light, equal to that of the iGen’s angle of view. Because the emitter is
positioned to the side of the objective lens, at short distances you will notice a shadow
due to this offset. The infrared produces a round beam of light; at close distance, the
circle of light will clip the corners of the rectangular display. At very close range, you may
see a half-circle of bright light, while the rest of the scene is darker. You cannot control
the intensity of the infrared light, other than to set it in automatic mode. In automatic
mode, the output of the emitter is adjusted to provide the correct amount of infrared
required for optimum illumination. Since the device is very sensitive to infrared light, high
21
Adjustable Features
a movie is a collection of frames repeated at 30 frames per second. Below 15fps, a moving
image may appear to move unevenly. Likewise, below 12fps, the image may shake if a
person is unable to hold the iGen completely still. If you concentrate on holding the device
still, you should find the device very useful down to 10 or 12fps.
At very long exposure times, down to 2fps, the light-gathering capability of the iGen is
truly remarkable. However, to be useful at such long exposure times the device must be
positioned on a stable surface. You may rest it on a flat surface suitable for viewing, or
connect to a tripod mount. The tripod adapter fitting located at the base of the device will
connect to all standard tripod mounts, with a fitting size of 1/4 - 20.
8. Video Format
(control is located under the SYSTEM menu)
When recording on an external device using the Video Composite Output, select the
format compatible to your recording device.
Selections are:
NTSC (for devices sold in the U.S. This is the default setting)
PAL (European standard)
When choosing PAL format, the device automatically changes exposure to 24fps, as this
rate is the closest iGen internal rate to the PAL standard. If another frame rate is preferred,
the user can change it using the exposure control.
Содержание iGen-LE
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