Burris BTC35 v2 — 400×300 thermal clip-on

How far you can see a person

112 m make out detail182 m tell what it is729 m spot it┆ maker’s claim

501002005001k2k5k m

Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Burris quotes 1,000 m, 1.4× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

BurrisClip-on · 400-class

Burris BTC35 v2

Approx. price: ~$3,000
Sensor: 400×300 · 12 µm
Lens: 35 mm · 1×
Weight: 16.2 oz

Buy from Burris

Price and availability on Burris’s site may differ.

Best for

Keeping your day scope and its zero while adding thermal at night

01Specifications

As published by Burris. Sources: burrisoptics.com page (item 300622, MSRP $3,000; listed in the maker's current lineup, not marked discontinued; clip-on unity 1x per page '1-4x', the manual's '3.2X optical zoom' line is the BTS table copied over; 2x 16340 RCR123 rechargeable, ≥2 h; ≤460 g) + BTC v2 user manual (NETD ≤50 mK; 1,000 m deer, 2,400 m car detection; photo, video via BurrisConnect app over Wi-Fi) + burrisoptics.com US thermal warranty page; bare unit no longer at opticsplanet.com, midwayusa.com sells it in RT-3, RT-6 red-dot combos.

Sensor: 400×300
Pixel pitch: 12 µm
NETD: ≤50 mK
Refresh rate: 50 Hz
Lens: 35 mm
Base magnification: 1×
Digital zoom: up to 4×
Field of view: 7.8° horizontal
Display: 1024x768 OLED
Claimed detection: 1,000 m
Claim basis: deer
Run time: 2 h
Battery type: CR123
Weight: 16.2 oz
Length: 5.9″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: 3 years
Approx. price: ~$3,000

02Pros and cons

From the published specs, not owner reports.

For it

Takes CR123 batteries you can swap in the field
Light at 16.2 oz, 6th-lightest of the 29 clip-ons here
Waterproof (IP67), survives a dunking
Records video and connects to a phone app

Against it

Only 2 h of battery
16.2 oz hanging off the front of your day scope
No rangefinder, so you judge distance by eye
Zoom past 1× is digital and gets blurry

03Compare the v2

04Related units

More from Burris →All 400-class →All 35 mm →

Burris BTC35 v3 — 400×300 thermal clip-on

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Burris BTC35 v3

Est. detection

729 m

Maker’s claim

1,000 m

Sensor: 400×300
Pitch · Hz: 12 µm · 50
Lens: 35 mm

16.2 oz~$3,000

Athlon Cronus ATS Pro 35C-400 — 400×300 thermal clip-on

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Athlon Cronus ATS Pro 35C-400

Est. detection

729 m

Maker’s claim

not published

Sensor: 400×300
Pitch · Hz: 12 µm · —
Lens: 35 mm

16.7 oz~$3,000

Athlon Cronus ATS Pro 35CL-400 — 400×300 thermal clip-on

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Athlon Cronus ATS Pro 35CL-400

Est. detection

729 m

Maker’s claim

not published

Sensor: 400×300
Pitch · Hz: 12 µm · —
Lens: 35 mm

LRF · 16.5 oz~$3,500