Clip On and Handheld Thermal Viewing
The Guide ORION O635CS thermal clip-on is a compact thermal imaging attachment for compatible daytime optics. It also supports handheld monocular mode, allowing the same device to serve as a handheld thermal spotter for observation.
The O635CS provides 1× magnification with a 35mm F0.9 objective. Its 12.5° × 9.4° field of view covers 22 × 17m at 100m, with thermal detection up to 1800m. Adapter rings are optional accessories, and compatibility depends on the host optic and selected adapter.
ApexVision Thermal Imaging
The ApexVision S1 architecture combines an ApexCore S1 detector, Nexus 1.0 platform and Hyper-Light 2.0 algorithm. Its uncooled VOx sensor resolves 640 × 512 pixels at a 12µm pitch, with 15mK NETD and a 50Hz frame rate. Image processing adjusts contrast, brightness, target highlighting and tonal balance.
AMOLED Display and Manual Focus
The 0.49-inch AMOLED display presents thermal imagery at 1920 × 1080 resolution. Seven palettes let you select a display appearance to suit the scene. Manual focus uses a tactile focusing knob, and the eyepiece provides 20mm eye relief. Startup takes approximately three seconds, with 26ms image latency.
Compact Housing and Replaceable Power
The O635CS weighs 285g and measures 99 × 73 × 68mm. A single replaceable 18500 battery provides up to seven hours of operating time, while USB-C accepts an external power supply. Two 18500 batteries and a battery charger are supplied.
The housing carries an IP67 rating and a 6000J shock-resistance specification. Its operating temperature range is -20°C to +50°C.
Technical Specifications
| Specification |
Value |
| Brand |
Guide |
| Series |
ORION C |
| Model |
O635CS |
| Product type |
Thermal clip-on imaging attachment with handheld monocular mode |
| Thermal imaging system |
ApexVision S1 |
| Core components |
ApexCore S1 detector; Nexus 1.0 platform; Hyper-Light 2.0 algorithm |
| Detector |
Uncooled VOx infrared detector |
| Spectral range |
8–14µm |
| Sensor resolution |
640 × 512 pixels |
| Pixel pitch |
12µm |
| Thermal sensitivity NETD |
15mK |
| Frame rate |
50Hz |
| Objective lens |
35mm F0.9 |
| Magnification |
1× |
| Field of view |
12.5° × 9.4° |
| Linear field of view |
22 × 17m at 100m |
| Thermal detection range |
Up to 1800m |
| Focus |
Manual |
| Display |
0.49-inch AMOLED; 1920 × 1080 pixels |
| Colour palettes |
White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia |
| Eye relief |
20mm |
| Startup time |
Approximately 3 seconds |
| Image latency |
26ms |
| Power interface |
USB-C external power supply |
| Battery type |
One replaceable 18500 battery |
| Operating time |
Up to 7 hours |
| Operating temperature |
-20°C to +50°C |
| Shock resistance |
6000J |
| IP rating |
IP67 |
| Weight |
285g |
| Dimensions |
99 × 73 × 68mm |
Use and Care
- Use the handheld monocular mode for independent thermal observation, or the clip-on mode with compatible daytime optics and a suitable optional adapter.
- Adjust manual focus and select the colour palette that suits the observed scene.
- Power the device with one replaceable 18500 battery or through its USB-C power input. A second 18500 battery and a charger are supplied.
- Operate within the -20°C to +50°C temperature range and follow the supplied quick start guide for device handling and care.
Package Contents
Guide ORION O635CS device; Carry bag; Accessory bag; Lint-free cloth; Battery charger; Two 18500 batteries; USB-A to USB-C cable; Quick start guide; Warranty card.
Frequently Asked Questions
Can the O635CS be used as a handheld monocular
Yes. It supports a handheld monocular mode as well as its clip-on attachment mode.
Which sensor and display does this model use
The O635CS has a 640 × 512, 12µm thermal sensor and a 0.49-inch 1920 × 1080 AMOLED display.
What is the thermal detection range
The stated thermal detection range is up to 1800m. Magnification is 1×, and the field of view is 12.5° × 9.4°.
Which battery does it use
The device runs on one replaceable 18500 battery, with up to seven hours of operating time. Two 18500 batteries and a battery charger are supplied.
Are adapter rings part of the standard package
Adapter rings are optional accessories. Select an adapter that matches the host optic and the O635CS interface; compatibility is specific to the complete setup.
