Carl Zeiss 640 x 512 DTI 4/35 Digital Thermal Imaging Camera (50Hz) - Manual (Page 10)

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TECHNICAL DATA 3/25 GEN 2 3/35 GEN 2 4/35 4/50
Optics
Focal length 25 / F1.0 35 / F1.0 35 / F1.0 50 / F1.1
Detection range
(object size 1.8 m × 0.5 m; 2 yd × 0.6 yd)
m (yd) 930 (1,018) 1,302 (1,425) 1,845 (2,018) 2,635 (2,883)
Subjective angle of view ° 30 30
Field of view at 100 m (at 100 yd) m (ft) 26 (78) 19 (56) 22 (66) 15 (46)
Field of view ° horizontal × vertical 15 Ч 11 11 Ч 8 13 Ч 10 9 Ч 7
Optical magnification 1.7 2.4 2 2.9
Maximum digital zoom 1.0 x – 4.0 x 1.0 x – 4.0 x
Zoom increments 0.5x 0.5x
Sensor
Sensor resolution px 384 Ч 288 640 Ч 512
Sensor pixel pitch μm 17 12
Frame rate Hz 50 50
NETD mK ≤ 35 ≤ 25
Display
Display resolution px 1,024 Ч 768 1,024 Ч 768
Display type AMOLED AMOLED
Electronics
Interfaces
USB: charging + data transfer
WLAN: data transfer
USB: charging + data transfer
WLAN: data transfer
Battery Lithium-ion Lithium-ion
Battery life h 8 7
External power supply 5V / 2A (USB) 5V / 2A (USB)
Internal memory GB 32 32
Video/image/live-streaming feature  
WLAN frequency GHz 2.4 2.4
WLAN standard IEEE 802.11/b/g/n IEEE 802.11/b/g/n
Connection with other devices ZEISS Hunting App, USB ZEISS Hunting App, USB
General
Protection type IP66 IP66
Operating temperature range °C (°F) -10 / +40 (+14 / +104) -10 / +40 (+14 / +104)
Length × width × height mm (inch)
187 Ч 60 Ч 65
(7.4 Ч 2.4 Ч 2.5)
193 Ч 60 Ч 65
(7.6 Ч 2.4 Ч 2.5)
193 Ч 60 Ч 65
(7.6 Ч 2.4 Ч 2.5)
206 Ч 60 Ч 65
(8.1 Ч 2.4 Ч 2.5)
Weight g (oz) 410 (14.5) 420 (14.8) 430 (15.2) 470 (16.6)
Subject to changes in design and scope of supply due to technical improvements.
Power on/off
Press the on/off button (5) for a longer time to switch on the device.
Press and hold the on/off button (5) to switch off the device again.
Note: The on/off button (5) must be pressed
until the OFF symbol appears on the display. Only
then can the on/off button (5) be released and
the device switches off. If the on/off button (5) is
released before the OFF symbol is displayed, the
device does not switch off but switches to standby
mode.
Standby mode
Briefly press the on/off button (5) to switch the
device to standby mode. Briefly press the on/off button (5) again to switch the device
back to observation mode.
Calibration
The device can be calibrated automatically (Auto Calibration = On) or manually
(Auto Calibration = Off).
In automatic mode, the device automatically performs a calibration by closing and
opening an internal shutter when necessary. A gentle click should be heard. In this
mode, you also have the option of performing the calibration manually by pressing the
shutter button (6) and the menu button (8) simultaneously.
There is a further option for performing a manual, silent calibration. Go to the device
menu and set the “Auto Calibration” option to “Off”. Then return to the observation
mode. Close the lens cap manually (2) . Now press the shutter button (6) and the menu
button (8) simultaneously. The device is now calibrated again.
Note: Always cover the lens when performing a manual calibration. Otherwise the
sensor cannot calibrate correctly and the image will deteriorate, e.g. ghost images.
If you forget to cover the lens during a manual calibration, repeat the calibration
procedure with the lens covered.
Observation mode
Look through the viewfinder (10) to observe the scene. Turn the diopter adjustment
(11) on the side to focus the screen.
Turn the focus ring (1) on the lens to focus on the scene.
Zoom
In observation mode, the arrow buttons (7) can be used to zoom in (right arrow
button) and zoom out (left arrow button) the scene. Zoom in increments of 0.5
between 1.0x and 4.0x. The zoom function is circular, i.e. if you press the right arrow
key (7) again after a 4.0x zoom, you will return to 1.0x.
The currently set digital magnification is shown on the display. Under the system menu
item “Max. Zoom Level” you can set the maximum desired zoom level.