Thermal Clip-On

C Series

Add thermal vision to a compatible day optic. The C Series brings a compact clip-on format, adjustable interface and media recording. Each model includes a laser rangefinder

C50RC35R

Where to buy Specifications

C50R640 × 512Sensor resolution

C50R≤18 mKThermal sensitivity · NETD

C50R2 600 mDetection range

C50RIP67Protection rating

Highlight features

Lightweight
2600m detection range · 50mm models
Digital compass
Auto screen off
IP67 protection

Plug and play

The ZEN C Series combines precise shooting with an effortless pre-zeroing process that maintains a consistent point of impact from one rifle to another.

C50R · C35R

Compact & lightweight

The C Series pairs compact magnesium housings with integrated laser rangefinding. C50R weighs 425 g and C35R weighs 410 g.

Extra-long battery life

Two 18350 batteries deliver up to 6 hours of continuous operation per set on C50R, or 7 hours on C35R.

Crystal clear image quality

An ultra-sensitive thermal detector reveals the dark as if it were daylight. Vivid, detailed imagery and 12 color palettes help you spot what cannot otherwise be seen.

Easy mode

Easy Mode enlarges menu icons and text and displays only the most commonly used functions. It improves readability and makes the interface easier to use, especially for older users.

UI zoom

Adjust the size of menu controls in the operating view with UI Zoom.

Pre-record

Connect to the ZEN LINK app to automatically transfer videos captured before and after the shot to your phone.

Virtual reticle

The Zentron thermal clip-on includes a virtual reticle in video recordings for a more realistic shooting record. It helps hunters document their shots with an aiming reference in the recorded footage.

Superior shock resistance

Withstanding recoil of up to 1000g/0.4ms, the ZEN C Series maintains reliability and precision in extreme operating conditions.

Ranging and app-configured ballistics

Check distance with the integrated laser rangefinder. Configure your ballistic profile in the ZENLINK app and use the saved parameters with range data for ballistic calculation. Select the correct profile and verify your setup before use.

Available only on devices equipped with a laser rangefinder (LRF).

Specifications

Compare all models

Series	C50R	C35R
Detector type	Uncooled VOx
Sensor resolution	640 × 512	384 × 288
Pixel pitch	12 μm
Frame rate	50 Hz
Spectral range	8–14 μm
Thermal sensitivity · NETD	≤18 mK	≤20 mK
Optics
Objective lens	50 mm f1.0	35 mm f1.0
Field of view (H × V)	8.7°(H) × 7°(V)	7.5°(H) × 5.6°(V)
Minimum focus distance	8 m	5 m
Detection range	2 600 m	1 800 m
Optical magnification	1×
Laser rangefinder
Laser class	Class 1
Wavelength	905 nm
Maximum measuring range	2 000 m	Day: 1 100 m Night: 1 500 m
Measurement accuracy (m)	≤±0.5 m (D ≤ 80 m) ±1 m (D ≤ 1 000 m) ≤±(0.2 + 0.0015 × D) m (D > 1 000 m) D = measured distance (m)	≤±1 m (≤300 m) ≤±2 m (>300 m)
Minimum measuring range	5 m
Display
Display type	OLED
Display resolution	1920 × 1080	800 × 600
Functions & connectivity
Colour palettes	White hot, black hot, iron red, tint…
Startup time	< 5 s
Wi-Fi, Bluetooth & microphone	Supported
Integrated sensors	Accelerometer and digital compass
Internal storage	64 GB	32 GB
Power & connections
Battery configuration	2 × 18350
Maximum battery life	6 h	7 h
USB connection	USB-C
Dimensions & construction
Dimensions (L × W × H)	147 × 65 × 74 mm	142 × 65 × 63 mm
Weight	425 g	410 g
Connection thread	M45×0.75
Environmental performance
Housing material	Magnesium
Protection rating	IP67
Operating temperature	-20 °C–50 °C
Storage temperature	-40 °C–50 °C
Recoil resistance	1000 g/0.4ms
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