Good night vision is a placement problem before it is a specification
Infrared range claims do not guarantee useful faces, clothing detail or vehicle evidence. Reflections, close objects, motion and exposure settings can spoil an otherwise capable camera.
Behind glass?
Built-in infrared commonly reflects from the glass back into the lens. Disable it and use suitable exterior lighting or mount the camera outside.
Washed-out foreground?
Walls, soffits, drainpipes, foliage and spider webs close to the lens can dominate exposure. Reframe or reduce illumination.
Sharp stills, blurred people?
Slow shutter speeds brighten a scene but smear movement. Test with a real person walking through the target area.
Symptom, cause and practical fix
| Symptom | Likely cause | Try this |
|---|---|---|
| White haze through a window | Infrared reflecting from glass, dirt or interior surfaces | Switch off built-in IR; clean the glass; block indoor reflections; preferably move the camera outside. |
| Bright centre, dark background | A close wall, eave or object is returning too much IR | Re-aim, mask the obstruction, reduce IR intensity or use separate illumination placed away from the lens. |
| Floating bright streaks | Rain, snow, fog, dust, webs or insects close to the camera | Clean and reposition the unit, reduce nearby light attraction and test in wet weather. |
| Face lacks detail | Subject too far away, motion blur, backlight or overexposure | Narrow the scene, improve visible lighting and tune exposure for the target distance. |
| Colour disappears too early | Night-mode threshold or available light | Review day/night switching and add even, controlled visible lighting if colour matters. |
A useful night test
- Record a daytime baseline from the final mounting height.
- Repeat at dusk, full darkness and with porch or street lights on.
- Walk toward, across and away from the camera.
- Check faces and clothing in exported footage—not only the small live preview.
- Repeat after rain, when reflections and water droplets are more demanding.
- Test alerts, recording start time and the seconds before the event.
- Check whether a hood, dome or nearby surface enters the infrared beam.
Settings worth understanding
IR intensity
Automatic is a starting point. Reducing intensity can recover detail when nearby surfaces are overexposed.
Shutter and gain
More brightness can mean more blur or noise. Tune for moving subjects rather than a perfect empty scene.
Detection zones
Exclude foliage, roads and reflective areas where possible, but never let an activity zone substitute for a useful camera view.
Number-plate capture is a specialist task involving angle, shutter, illumination and distance. A wide overview camera rarely provides dependable plate detail at night.
Continue planning
Compare outdoor camera previews · Plan camera placement · Audit camera privacy and security
Official technical references
Axis documentation explains IR illumination controls and reflection reduction and day/night thresholds and IR-cut filter behaviour. Controls differ by camera.
Last checked: 1 September 2026. Always test the exact camera, scene and recording path; no specification guarantees identification.