Pulsar · Telos LRF XP50

Estimated range, standing human, clear air

IdentifyRecognizeDetectBox claim

Pulsar Telos LRF XP50640×480 · 17 µm · 50 mm

113 m identify184 m recognize735 m detectbox says 1,800 m (1.8 m object)

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Estimated from pixel pitch and lens focal length using the Johnson criteria (2, 8 and 13 pixels across a 0.5 m human critical dimension), clear air, 50 % probability. A model of the optics, not a measurement — real range depends on temperature contrast, humidity and the animal.

Pulsar

Pulsar Telos LRF XP50

Handheld monocular640-classLaser rangefinder

The Pulsar Telos LRF XP50 is a 640×480, 17 µm thermal handheld monocular behind a 50 mm lens, with a built-in laser rangefinder. On the Johnson yardstick that is an estimated 735 m detection and 184 m recognition range for a standing person; Pulsar quotes 1,800 m detection (1.8 m object). Its published <18 mK NETD ranks 8th of the 51 units here that publish one.

Approx. price: ~$3,700
Sensor: 640×480 · 17 µm
Lens: 50 mm · 2.5×
Est. detection: 735 m · 804 yd

Best for

Scanning from a stand, a truck or a field edge

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Box claim vs. what the optics support

Manufacturer says

1,800 m

detection, 1.8 m object

Johnson estimate

735 m

detect · 184 m recognize · 113 m identify

Claim ÷ estimate

2.4×

how much further the box reaches than a 2-pixel, 0.5 m criterion

One pixel of this unit sees 0.340 mrad (17 µm ÷ 50 mm). Two pixels across a 0.5 m human is 0.5 ÷ (2 × 0.340) × 1000 = 735 m. The box figure is usually computed against a person’s 1.8 m height instead, which is why it comes out higher. Full explanation.

Specifications

Manufacturer-published figures, cross-checked against pulsarnv.com, outdoorlegacygear.com.

Sensor: 640×480
Pixel pitch: 17 µm
NETD: <18 mK
Refresh rate: 50 Hz
Lens: 50 mm
Base magnification: 2.5×
Digital zoom: up to 4×
Field of view: 12.4° horizontal
Display: 1024x768 AMOLED
Claimed detection: 1,800 m
Claim basis: 1.8 m object
Run time: 8.5 h
Battery type: Removable pack
Weight: 25.4 oz
Length: 9.4″
Laser rangefinder: Yes
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IPX7
Warranty: 3 years (5 with registration)
Approx. price: ~$3,700

Derived here

IFOV: 0.340 mrad
Est. detection: 735 m
Est. recognition: 184 m
Est. identification: 113 m
Claim ÷ estimate: 2.4×
Derived field of view: 12.4°
Pixels per degree: 51.5

Features

640 sensor
17 µm
50 mm lens
50 Hz
LRF
Removable battery
Records video
Wi-Fi
IPX7
NETD ≤ 20 mK
AMOLED display

What the spec sheet says

Read from the published specifications and this catalog’s own numbers — not from owner reports, which we have not collected for this unit.

For it

640×480 core — 2.8× the pixels of a 384-class unit
Published NETD of <18 mK, 8th-lowest of the 51 units here that publish one
Built-in laser rangefinder
Removable battery pack — a spare in the pocket doubles the run time
8.5 h published run time, 18th-longest of 64 here
IPX7 sealed — survives immersion, not just rain
Records video and streams to a phone over Wi-Fi

Against it

25.4 oz — 2nd-heaviest of the 18 handhelds here
NETD published only as a ceiling (<18 mK), not a measured figure
Rangefinder but no ballistic calculator — the holdover is still yours to work out
25.4 oz, above the 18.1 oz median for handhelds here