Our thermal-zoom EO/IR PTZ camera against FLIR Ranger HDC MR, Silent Sentinel Aeron and Axis Q8752-E Mk II: continuous thermal zoom that searches wide and interrogates close.
This is the zoom-thermal member of the PTZ family. A continuous-zoom thermal lens widens the search field and roughly doubles the fixed-lens variant's thermal detection. The comparison is the same field of border positioners, read against a camera built to search and then identify on one channel.
This is a fielded perimeter camera, not a lab build. The same 30x full-HD day channel and rugged IP66 positioner as the fixed-lens variant carry a 15-75 mm continuous-zoom LWIR thermal imager: a wide 43.4-degree search field narrowing to 8.2 degrees for identification, detecting a person at 3.6 km and a vehicle at 7.1 km on thermal, and a person at 10 km and a vehicle at 20 km by day. Preset accuracy is ±0.1 degree.
Side by side
| Attribute | Represented by UnstratEO/IR PTZ camera with thermal zoom | Teledyne FLIRRanger HDC MR high-definition mid-range surveillance system1United States | Silent Sentinel (Pelco / Motorola Solutions)Aeron dual-vision PTZ (zoom thermal option)2United Kingdom | Axis CommunicationsAXIS Q8752-E Mk II bispectral PTZ camera3Sweden |
|---|---|---|---|---|
| Thermal lens123 | 15-75 mm continuous zoom, 5x optical and 4x digital, FOV 43.4 to 8.2 degrees | Two optical fields of view with digital zoom between them on the cooled variants; optical zoom greater than 12x on the 350 | Fixed or zoom thermal lens options, exact zoom range set per order | Fixed thermal lens; digital zoom on the thermal channel |
| Thermal detector123 | Uncooled LWIR 640x512, 8-14 µm, 17 µm pitch, NETD better than 55 mK | Cooled InSb 1280x720 (350/550) or uncooled 1024x576 (UC) | Thermal channel, resolution not published on the fact sheet read | Bispectral thermal channel; resolution not published on the datasheet read |
| Thermal search field of view123 | 43.4 degrees wide, for fast wide-area search | Wide FOV up to 38.0 x 21.5 degrees on the 350 variant | Field of view set by the chosen thermal lens; not published as a single figure | Not published as a single thermal search FOV on the datasheet read |
| Person detection, thermal123 | 3.6 km | Not published as a single person figure on the datasheet read; range varies by lens | Up to 4.6 km (lens dependent) | Not published as a person detection figure on the datasheet read |
| Vehicle detection, thermal123The zoom-thermal variant roughly doubles the fixed-lens 5 km vehicle figure to 7.1 km. The Aeron still reaches further with larger optics; the trade is size, cost and export terms. | 7.1 km | Not published as a single vehicle figure on the datasheet read; range varies by lens | Up to 14.3 km (lens dependent) | Not published as a vehicle detection figure on the datasheet read |
| Day camera123 | 1/2.8-inch STARVIS 2 CMOS, 1920x1080, 30x optical and 12x digital zoom | 1920x1080 HD colour TV camera, 4.3-129 mm | HD visible camera with 30x zoom | Visible channel with Lightfinder 2.0 and Forensic WDR |
| Pan and tilt123 | 360 degree continuous pan, -90 to +40 degree tilt, preset accuracy ±0.1 degree, pan to 100 degrees per second | Fast and accurate pan-tilt stated; figures not published on the datasheet read | 360 degree continuous rotation, pan/tilt to 160 degrees per second, 0.01 degree positioning | 360 degree infinite pan with electronic image stabilisation |
| Environmental rating123 | IP66, 24 VDC ±10%, 50 W, about 12 kg | Not published as an IP rating on the datasheet read | IP67, -30 to +65 degrees C | Outdoor-rated; figure not published on the datasheet read |
| Origin and export position123 | Independent, non-aligned origin, supplied and supported by one accountable team | United States (export-controlled defence product) | United Kingdom | Sweden |
Competitor values are quoted from the vendor documents listed under Sources, as published on the date shown. Configurations vary, so treat every row as a starting point for the evaluation rather than a like-for-like test result.
What the table means
Continuous thermal zoom is a search-then-identify tool.
The value of the 15-75 mm continuous thermal lens is that one channel does two jobs: a 43.4-degree wide field sweeps a sector quickly, then the lens narrows to 8.2 degrees to interrogate a contact without a second camera. That widens the effective thermal detection to 3.6 km on a person and 7.1 km on a vehicle, roughly double the fixed-lens variant. The Ranger achieves a similar search-and-zoom behaviour with two optical fields of view and digital zoom between them on its cooled variants; the Aeron offers zoom thermal lenses set per order. The question is whether you want continuous zoom on one uncooled channel or a stepped, higher-end cooled system.
The Aeron and cooled Ranger still reach further, at a price.
Even doubled, our 7.1 km vehicle figure sits below the Aeron's 14.3 km and the reach of a cooled Ranger, because those systems use larger or cooled thermal optics. That is a genuine edge for a very deep perimeter. It is also more weight, more cost and, for the Ranger, US export control. Our zoom-thermal camera is honest about being an uncooled 640x512 with a continuous 15-75 mm lens; for a perimeter that fits a 3.6 km person and 7.1 km vehicle band it does the search-and-identify job on one channel at a lighter, non-export-controlled footprint.
Same positioner discipline and non-aligned supply.
The zoom-thermal camera keeps the same 30x day channel, the same IP66 positioner and the same ±0.1 degree preset accuracy as the fixed-lens variant, so a site can mix both and manage them the same way. And like the rest of the family it comes from an independent, non-aligned supplier, which keeps the positioner and its spares inside the operator's jurisdiction rather than on a US, UK or Swedish export calendar.
Questions buyers ask
What is a good alternative to the FLIR Ranger HDC MR or Silent Sentinel Aeron with continuous thermal zoom?
The Ranger offers two optical fields of view with digital zoom between them on its cooled variants, and the Aeron offers zoom thermal lenses set per order; both reach further with larger or cooled optics. Ours uses a 15-75 mm continuous-zoom uncooled LWIR lens that sweeps a 43.4-degree search field and narrows to 8.2 degrees to identify, detecting a person at 3.6 km and a vehicle at 7.1 km on thermal, on the same IP66 positioner and 30x day channel as the fixed-lens variant, from a non-aligned supplier. If you want continuous thermal zoom on one channel without export control, that is the reason to shortlist it.
How much further does the thermal zoom reach than the fixed-lens variant?
Roughly double on the thermal channel. The fixed 50 mm variant detects a person at 2.4 km and a vehicle at 5 km on thermal; the 15-75 mm continuous-zoom variant reaches 3.6 km on a person and 7.1 km on a vehicle. The day channel is unchanged at 10 km on a person and 20 km on a vehicle. The zoom lens also gives you a wide 43.4-degree search field that the fixed 50 mm lens does not, which is what makes it a search-and-identify tool rather than a single fixed field.
Continuous zoom thermal or a cooled two-FOV system for a deep perimeter?
It depends on how deep. A cooled system like the Ranger 350/550 or a long-lens Aeron reaches further, to 14.3 km on a vehicle in the Aeron's case, and suits a very deep border. Our continuous-zoom uncooled channel reaches 3.6 km on a person and 7.1 km on a vehicle, searches wide and identifies close on one channel, and does it at lower weight, cost and licensing burden. Match the choice to your longest real detection requirement rather than the headline range, and verify both in a trial.
Does the zoom-thermal camera use the same positioner as the fixed-lens one?
Yes. It shares the 30x full-HD day channel, the IP66 positioner, the 360 degree continuous pan and the ±0.1 degree preset accuracy of the fixed-lens variant, so a site can run both and manage them identically. The only change is the thermal channel: a 15-75 mm continuous-zoom lens in place of the 50 mm fixed lens, which is what widens the search field and extends the thermal detection range.
Is this a fielded camera or a prototype?
Fielded. It is an IP66 EO/IR PTZ camera in service with a continuous-zoom thermal channel, streaming H.264/H.265 over Ethernet, with the 3.6 km person and 7.1 km vehicle thermal detection, the 43.4-to-8.2 degree field of view and the ±0.1 degree preset accuracy quoted here as the delivered specification.
Why does supplier nationality matter for a border camera with thermal zoom?
Because a perimeter sensor is installed for years, and its resupply, firmware and end-use terms arrive with the export licence. The Ranger HDC MR is a US defence product; the Aeron and the Axis carry UK and Swedish regimes. An independent, non-aligned supplier keeps the positioner, its zoom optics and its spares inside your jurisdiction, so the capability is not sustained on another state's export calendar.
Sources
- 1. Teledyne FLIR, Ranger HDC MR high-definition mid-range surveillance system (datasheet)Retrieved: 2026-08-15 · Read from the vendor datasheet: cooled InSb 1280x720 (350/550) or uncooled 1024x576 (UC) thermal, two optical fields of view with digital zoom, wide FOV up to 38.0 x 21.5 degrees on the 350, 1920x1080 HD colour TV camera 4.3-129 mm, fog and turbulence filters, slew-to-cue.
- 2. Silent Sentinel (Pelco / Motorola Solutions), Silent Sentinel Aeron fact sheet (December 2025)Retrieved: 2026-08-15 · Read from the vendor fact sheet: dual thermal and visible sensors, fixed or zoom thermal lens options, person detection up to 4.6 km and vehicle up to 14.3 km (lens dependent), 360 degree continuous rotation, pan/tilt to 160 degrees per second, 0.01 degree positioning, IP67.
- 3. Axis Communications, AXIS Q8752-E Mk II bispectral PTZ camera (datasheet)Retrieved: 2026-08-15 · Read from the vendor datasheet: bispectral thermal and visible camera, 360 degree infinite pan, electronic image stabilisation, Lightfinder 2.0 and Forensic WDR, digital zoom on the thermal channel.