10
these factors must be taken into account when
utilizing a Night Vision Device for observation or
navigation purposes.
Depth Perception
Night Vision does not present normal depth
perception. Use extreme caution when using a
Night Vision Device where reliance upon depth
perception is important.
Fog and Rain
Night Vision Devices are very responsive to
reflected ambient light; therefore, fog or heavy
rain can reflect too much light toward the Night
Vision Device and may seriously degrade its
performance.
Honeycomb
This is a faint hexagonal pattern throughout
the image area. This effect is more noticeable
under high light conditions. Do not be concerned
- the honeycomb effect is an inherent character
-
istic of all high-amplification night vision systems
that incorporate a microchannel plate in the
intensifier.
Black Spots
These are cosmetic blemishes in the image
intensifier. They do not affect the performance
or reliability of a night vision device and a num
-
ber of sizes are inherent in the manufacturing
process.
Image Intensifier Life
Night Vision Devices are designed to be robust.
The image intensifier tube, however, does not
have an unlimited lifetime. The life of the image
intensifier is dependent upon the amount of
use. Under normal operating conditions, it will
provide reliable performance for an extended
period of time.
7
2. Controls
The D-212 has an ON/OFF push switch (7) (fig.
1). To switch on the unit, push switch (7). To
switch it off, push it again. If you want to switch
on the IR illuminator, push switch (11).
3. Lens Replacement (optional)
Follow the same procedure to replace 80mm
f1.6 lenses with 26mm f1.4 lenses.
D-2MV
Remove the lenses
26mm f1.2
Replace the lenses
80mm f1.6
D-212
10
these factors must be taken into account when
utilizing a Night Vision Device for observation or
navigation purposes.
Depth Perception
Night Vision does not present normal depth
perception. Use extreme caution when using a
Night Vision Device where reliance upon depth
perception is important.
Fog and Rain
Night Vision Devices are very responsive to
reflected ambient light; therefore, fog or heavy
rain can reflect too much light toward the Night
Vision Device and may seriously degrade its
performance.
Honeycomb
This is a faint hexagonal pattern throughout
the image area. This effect is more noticeable
under high light conditions. Do not be concerned
- the honeycomb effect is an inherent character
-
istic of all high-amplification night vision systems
that incorporate a microchannel plate in the
intensifier.
Black Spots
These are cosmetic blemishes in the image
intensifier. They do not affect the performance
or reliability of a night vision device and a num
-
ber of sizes are inherent in the manufacturing
process.
Image Intensifier Life
Night Vision Devices are designed to be robust.
The image intensifier tube, however, does not
have an unlimited lifetime. The life of the image
intensifier is dependent upon the amount of
use. Under normal operating conditions, it will
provide reliable performance for an extended
period of time.
7
2. Controls
The D-212 has an ON/OFF push switch (7) (fig.
1). To switch on the unit, push switch (7). To
switch it off, push it again. If you want to switch
on the IR illuminator, push switch (11).
3. Lens Replacement (optional)
Follow the same procedure to replace 80mm
f1.6 lenses with 26mm f1.4 lenses.
D-2MV
Remove the lenses
26mm f1.2
Replace the lenses
80mm f1.6
D-212
