Leica Calonox 2 Sight — 640×480 thermal clip-on

How far you can see a person

135 m make out detail219 m tell what it is875 m spot it┆ maker’s claim

501002005001k2k5k m

Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Leica quotes 2,210 m, 2.5× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

LeicaClip-on · 640-class

Leica Calonox 2 Sight

Approx. price: ~$4,899
Sensor: 640×480 · 12 µm
Lens: 42 mm · 1×
Weight: 21.9 oz

Price and availability on Leica’s site may differ.

Best for

Keeping your day scope and its zero while adding thermal at night

01Specifications

As published by Leica. Sources: leicacamerausa.com ($4,899.00; page copy says 'up to 10 hours' and 'made in Germany'), leica-camera.com Calonox 2 Sight + Sight LRF + Sight SE technical data PDF (May 2025) — FLAG: the PDF host returned 502 all session, so its figures (640x480 12 um, 60 Hz, 42 mm, 1x, OLED 1920x1080, 10.3 x 7.7 deg = 18 x 13.5 m, 100 m, 2,210 m, 2 px, approx. 6:45 h, approx. 620 g with battery, 139 x 89 x 61.5 mm, IP67, Wi-Fi + Bluetooth, 32 GB) were taken from the search index's rendering of that PDF, not a direct read; they match the catalog's Calonox 2 Sight LRF row from the same sheet.

Sensor: 640×480
Pixel pitch: 12 µm
Refresh rate: 60 Hz
Lens: 42 mm
Base magnification: 1×
Field of view: 10.3° horizontal
Display: 1920x1080 OLED
Claimed detection: 2,210 m
Claim basis: 2 px criterion (Leica 'recognition' 770 m at 6 px, 'identification' 390 m at 12 px)
Run time: 6.75 h
Battery type: Internal Li-ion
Weight: 21.9 oz
Length: 5.5″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: 10 years (Passport Protection Plan)
Approx. price: ~$4,899