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iRayUSA · Bolt TH50C V2
Estimated range, standing human, clear air
iRayUSA Bolt TH50C V2640×512 · 12 µm · 50 mm
160 m identify260 m recognize1,042 m detectbox says 2,190 m (unspecified)
501002005001k2k5k m
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.
iRayUSA

iRayUSA Bolt TH50C V2

Riflescope640-class

The iRayUSA Bolt TH50C V2 is a 640×512, 12 µm thermal riflescope behind a 50 mm lens. On the Johnson yardstick that is an estimated 1,042 m detection and 260 m recognition range for a standing person; iRayUSA quotes 2,190 m detection. Its 8 h published run time is 21st-longest of the 64 units here that publish one.

Approx. price
~$5,499
Sensor
640×512 · 12 µm
Lens
50 mm · 3.5×
Est. detection
1,042 m · 1,140 yd
Best for

A dedicated night rifle for hogs and coyotes on open ground

Buy from iRayUSA

We may earn a commission. Price and availability on iRayUSA’s site may differ.

Box claim vs. what the optics support

Manufacturer says
2,190 m
detection, unspecified
Johnson estimate
1,042 m
detect · 260 m recognize · 160 m identify
Claim ÷ estimate
2.1×
how much further the box reaches than a 2-pixel, 0.5 m criterion

One pixel of this unit sees 0.240 mrad (12 µm ÷ 50 mm). Two pixels across a 0.5 m human is 0.5 ÷ (2 × 0.240) × 1000 = 1,042 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 irayusa.com.

Sensor
640×512
NETD
<25 mK
Lens
50 mm
Digital zoom
up to 4×
Field of view
8.8° horizontal
Display
2560x2560 AMOLED
Claim basis
unspecified
Battery type
Internal + removable
Weight
33.2 oz
Length
14.5″
Records video
Yes
Wi-Fi
Yes
Warranty
5 years
Country of origin
China
Approx. price
~$5,499

Derived here

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.

IFOV
0.240 mrad

Features

  • 640 sensor
  • 12 µm
  • 50 mm lens
  • 50 Hz
  • Removable battery
  • Records video
  • Wi-Fi
  • IP67
  • 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
  • 640×512 core — 3.0× the pixels of a 384-class unit
  • 12 µm pitch — the 50 mm lens sees what a 17 µm core would need 71 mm to match
  • Publishes its NETD (<25 mK) — 16 units here do not
  • Removable battery pack — a spare in the pocket doubles the run time
  • 8 h published run time, 21st-longest of 64 here
  • IP67 sealed — survives immersion, not just rain
  • Records video and streams to a phone over Wi-Fi
Against it
  • No rangefinder — judging distance through a thermal is the hard part
  • NETD published only as a ceiling (<25 mK), not a measured figure
  • ~$5,499 against a ~$3,749 median for riflescopes here
  • 33.2 oz, above the 27.5 oz median for riflescopes here

Compare the V2

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iRayUSA

iRayUSA RICO Hybrid Compact HCH50R

Sensor · lens
640×480 · 50 mm
Pitch · refresh
10 µm · 60 Hz
Est. detection
1,250 m
Box claim
2,800 m
RiflescopeLRF60 Hz
25.6 oz~$5,299
iRayUSA · RICO Mk2 RH50R
iRayUSA

iRayUSA RICO Mk2 RH50R

Sensor · lens
640×512 · 50 mm
Pitch · refresh
12 µm · 60 Hz
Est. detection
1,042 m
Box claim
2,190 m
RiflescopeLRFSwappable battery60 Hz
36.6 oz~$5,499
Armasight · Contractor 640 3-12x50
Armasight

Armasight Contractor 640 3-12x50

Sensor · lens
640×480 · 50 mm
Pitch · refresh
12 µm · 60 Hz
Est. detection
1,042 m
Box claim
1,865 m
Riflescope60 Hz
32 oz~$2,999