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Zeiss DTI 6/40 — 640×480 thermal handheld monocular
How far you can see a person
128 m make out detail208 m tell what it is833 m spot it┆ maker’s claim
501002005001k2k5k m
Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Zeiss quotes 2,000 m, 2.4× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

ZeissHandheld monocular · 640-class

Zeiss DTI 6/40

Approx. price
~$4,800
Sensor
640×480 · 12 µm
Lens
40 mm · 3×
Weight
26.6 oz

No verified retailer link for this unit yet. Only links confirmed to open the right product are published — here’s why.

Best for

Scanning from a stand, a truck or a field edge

01Specifications

As published by Zeiss. Sources: opticsforce.com (full spec table; $4,799.99 sale, sold out on the day read; zeiss.com product pages 404 during site migration).

Sensor
640×480
Pixel pitch
12 µm
NETD
≤35 mK
Refresh rate
50 Hz
Lens
40 mm
Base magnification
3×
Digital zoom
up to 10×
Field of view
11° horizontal
Display
1024x768 AMOLED
Claimed detection
2,000 m
Claim basis
unspecified
Run time
6.5 h
Weight
26.6 oz
Length
9″
Laser rangefinder
No
Ballistic calculator
No
Records video
Yes
Wi-Fi
Yes
Approx. price
~$4,800

02Pros and cons

From the published specs, not owner reports.

For it
  • 640×480 sensor, 2.8× the detail of an entry-level 384
  • Records video and connects to a phone app
Against it
  • Heavy at 26.6 oz, 2nd-heaviest of the 112 handhelds here
  • No rangefinder, so you judge distance by eye
  • No waterproof rating published
  • ~$4,800, well above the ~$1,995 typical for handhelds here
  • Warranty terms not published

03Compare the 6/40

04Related units

More from Zeiss →All 640-class →All 40 mm →
Zeiss DTI 6/20 — 640×480 thermal handheld monocular
ZeissHandheld monocular

Zeiss DTI 6/20

Est. detection
417 m
Maker’s claim
1,000 m
Sensor
640×480
Pitch · Hz
12 µm · 50
Lens
20 mm
Swappable battery · 24.3 oz~$4,500
Leica Calonox 2 View — 640×480 thermal handheld monocular
LeicaHandheld monocular

Leica Calonox 2 View

Est. detection
875 m
Maker’s claim
2,210 m
Sensor
640×480
Pitch · Hz
12 µm · 60
Lens
42 mm
60 Hz · 22.7 oz~$4,899
Leica Calonox 2 View LRF — 640×480 thermal handheld monocular
LeicaHandheld monocular

Leica Calonox 2 View LRF

Est. detection
875 m
Maker’s claim
2,210 m
Sensor
640×480
Pitch · Hz
12 µm · 60
Lens
42 mm
LRF · 60 Hz · 24.3 oz~$5,899
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