Chiron Support
Everything you need to mount, zero and run your Chiron thermal riflescope — Pixfra's value-line thermal optic, sitting between the Cetus and the Pegasus 2 LRF. It comes as a Chiron Scope or with an integrated laser rangefinder (Chiron LRF), across 384 and 640 sensors on a 1440×1080 OLED display. Genuine Australian stock, full C.R. Kennedy warranty, serviced locally.
Getting Started
What's in the box?
Your Chiron ships with the thermal riflescope, a removable rechargeable battery, a USB-C charging cable, a lens cloth and a quick-start guide. The LRF models add the integrated laser rangefinder built into the body — there's nothing extra to fit. Mounts are model- and rail-dependent; if you bought a bundle, your rings or mount are included.
Chiron Scope or Chiron LRF — which do I have?
The Chiron comes two ways. The Chiron Scope has no laser rangefinder — it estimates distance from the target's size on screen (see Measuring distance without an LRF). The Chiron LRF adds an integrated laser rangefinder with a dedicated laser button on top, so you can range a target directly. If there's a laser button and a small laser window on the front, you have the LRF; if not, it's the Scope. Both share the same sensor, display and controls otherwise.
The Chiron range — sensors, lenses and models
All Chiron models share the same platform — a vanadium-oxide uncooled sensor with 12 µm pixels, a 1440×1080 OLED screen, six colour palettes and 1×–8× digital zoom — and differ by sensor, lens and whether they carry the rangefinder:
| Model | Sensor · Lens | Rangefinder |
|---|---|---|
| C435 | 384 · 35 mm | Scope (no LRF) |
| C425 LRF | 384 · 25 mm | 1,000 m laser |
| C635 LRF | 640 · 35 mm | 1,000 m laser |
| C650 LRF | 640 · 50 mm | 1,000 m laser |
A bigger lens reaches further; a 640 sensor gives a wider, more detailed picture than a 384. Your exact model is on the box and in the menu's system information.
Charging the battery and battery life
The Chiron runs a removable rechargeable battery, charged over the supplied USB-C cable. The charging indicator shows red while charging and green when full. Because the battery comes out, you can carry a charged spare for a long night. Start any firmware update or a big session from a full charge, and keep the cell in a sensible temperature range.
Turning it on and the controls
Press and hold the power button to switch the Chiron on or off; double-press it to drop into sleep (and press again to wake). The capture button takes a photo with a press and starts/stops recording when held. The menu / zoom / FFC button does three jobs — rotate it to change digital zoom, press it for the brief menu (the settings you change often), and hold it for the standard menu (full setup); double-press it to run an FFC. On LRF models the laser button fires the rangefinder. The full button map is in your quick-start guide.
Mounting & Zeroing
Mounting the Chiron
The Chiron has a metal housing rated to 1,000 g / 1 ms recoil, so it stands up to heavy-calibre rifles. Mount it on your rail with rings or a mount suited to the tube, get your eye relief right (around 44 mm), seat it square and tighten evenly so it holds zero under recoil. Set your diopter first (see the next article) so the reticle is sharp before you zero.
Zeroing your Chiron
Zero from the standard menu. First set (or pick) a zeroing profile, then open Zeroing, set your distance, fire a shot and move the reticle onto your point of impact, then save. Confirm on paper at your working distance. The Chiron holds multiple zeroing profiles, so you can save separate zeros for different rifles or loads and switch between them.
Reticles and holdover
The Chiron offers multiple reticle patterns and colours — choose one that suits your eye against a thermal image and set a colour that stands out from your palette. For holdover, use your reticle's subtensions at your known zero, and on LRF models let the rangefinder confirm distance first. Our Thermal Academy guide on reticles & holdover walks through the practical side.
Ranging
Using the laser rangefinder (LRF models)
On the Chiron LRF, press the laser button to range a target — the built-in laser rangefinder reads distance out to 1,000 m. Set your laser ranging mode first in the standard menu (single or continuous). The rangefinder only returns a reading beyond about 10 m, and like any laser it works best on a solid target in clear conditions — rain, fog and foliage shorten it. If it won't read, hold steady on a larger, firmer target.
Measuring distance without an LRF (Scope model)
The Chiron Scope has no laser, but it can still estimate range using video distance measurement — you tell it the target's height and place two markers on the top and bottom of the animal on screen, and it calculates the distance from the target's size in the frame. It's not as instant as a laser, but it's a genuinely useful way to judge range on the Scope model. Step through it from the menu as shown in your quick-start guide.
Image Quality
Sensor, NETD and what they mean for your image
The Chiron uses a vanadium-oxide uncooled thermal sensor (12 µm pixels, 8–14 µm) with a low NETD — the lower the NETD figure, the finer the temperature differences it can show, which means more detail and cleaner edges on your quarry. A 640 sensor gives a wider, more detailed picture than a 384. If you want the background, our Thermal Academy explainers on NETD and 384 vs 640 sensors cover it in plain English.
Why the image "clicks" and freezes (FFC calibration)
That brief click and freeze is a flat-field calibration (FFC) — the scope re-references the sensor so the image stays clean and even, and it's completely normal. The Chiron can run FFC automatically, manually, or immediately; double-press the menu/zoom/FFC button any time you want to force one. If the picture starts to look grainy or shows faint fixed marks, an FFC usually clears it.
Brightness, contrast and the six colour palettes
Set brightness and contrast from the menu to suit the conditions, and pick from six colour palettes — white hot, black hot, iron red, alarm, emerald and amber — via the brief menu (press the menu button, then rotate to select). White hot and black hot are the everyday go-tos; iron red and alarm make warm targets pop. Try a few in the field and settle on what your eye reads fastest.
My image is soft or washed out — what to check
Work through it in order: set your diopter so the reticle and menu text are sharp (that's your eye focus, and it's the most-missed step); adjust the objective focus for your target distance; run an FFC (double-press the menu button); and try a different palette or lower the contrast if it's glary. A cold, low-contrast scene simply carries less thermal detail — that's physics, not a fault. If it's still soft after all that, talk to the Australian team.
Recording & the App
Recording, and recoil-activated recording (RAR)
Hold the capture button to start and stop recording, or press it for a still. The Chiron also has RAR — Recoil Activated Recorder — which automatically captures the moments around your shot, so you catch the hit without having to hit record first. Footage saves to the scope's built-in storage. There's a microphone on board for audio on your clips.
Connecting to the Pixfra Outdoor app
The Chiron has a Wi-Fi hotspot that links to the Pixfra Outdoor app for live phone mirroring, playback and settings. Turn on Wi-Fi in the menu, join the scope's hotspot from your phone, then open the app and add the device. The app is also the easiest way to update firmware.
Getting footage off
Two ways: connect to a computer over USB-C, enable storage mode and copy your stills and video off the drive; or review and transfer clips over the Pixfra Outdoor app once the phone is connected to the scope's hotspot.
Care & Troubleshooting
Updating firmware
Update over the Pixfra Outdoor app when it prompts you — connect the phone to the scope's Wi-Fi hotspot and follow the app. Start from a well-charged battery and don't interrupt the update. Keeping firmware current is the first thing to try if the scope starts behaving oddly.
Cleaning and waterproofing
The Chiron has a metal body sealed to IP67, so rain and dust are no problem. Wipe it with a soft dry cloth, or one barely dampened with a mild neutral detergent — never alcohol, benzene, thinners or abrasives — and keep your hands off the front lens. Store it dry, and top the battery up every few months during long storage.
Factory reset
A factory reset in the system menu returns the Chiron to default settings — you'll re-set your preferences and re-check your zero afterward, so only use it if a restart and a firmware update haven't fixed odd behaviour.
Quick troubleshooting
| Problem | First checks |
|---|---|
| Won't turn on | Charge over USB-C (red light = charging); battery seated; hold the power button firmly |
| Soft / washed-out image | Set the diopter; refocus the objective; run an FFC (double-press menu); try another palette |
| Image grainy or fixed marks | Run an FFC; if it persists, check for a firmware update |
| LRF won't range (LRF models) | Target beyond 10 m; hold steady on a solid target; avoid rain/fog/foliage; stay within 1,000 m |
| Zero seems off after transport | Check mount seating and torque; re-confirm zero on paper |
| No app / no recording | Wi-Fi on; correct hotspot; app updated; battery charged |
If it's none of those, talk to the Australian team — real people who run this gear.
Warranty and service
Your Chiron is backed in Australia by C.R. Kennedy. If it ever needs attention it's assessed and serviced locally — never sent overseas. Keep your proof of purchase; Pixfra Australia is the direct retailer, so you deal with us, not a middleman.
Still need a hand?
Talk to the Australian team — we use this gear and we service it here.
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