Description
The DNT Hydra LRF HS335R is one of those optics that earns its keep because it wears several hats at once. It works as a standalone thermal riflescope, a clip-on ahead of your daytime optic, and a handheld monocular for scanning, plus it packs an integrated laser rangefinder and an onboard ballistic calculator. For hunters who are past entry-level gear but don't want to spend a fortune, this is the sweet spot in the Hydra lineup.
At the heart of it sits a 384×288 uncooled sensor with a 12-micron pixel pitch and a sensitivity of 18mK or better, which is the kind of number that separates a clean thermal picture from a muddy one. DNT pairs that sensor with a 35mm F/1.0 germanium objective lens for 3x base magnification, and you can push the digital zoom up to 12x when you need a closer look. Their Image Super Resolution processing squeezes extra detail out of the picture, and everything shows up on a crisp 1024×768 Micro-OLED display running at 50Hz. You get multiple color palettes, picture-in-picture, and onboard photo and video recording with audio straight to 32GB of built-in memory.
Why the HS335R Rangefinder Changes the Game
The built-in laser rangefinder reads targets from 5 all the way out to 1,300 yards, and it feeds that distance straight into the ballistic engine. The calculator then spits out holdover corrections based on your rifle's profile, which you can build and tweak right on the device or dial in through the DNT app over WiFi. That combination takes a lot of the guesswork out of longer shots in the dark.
Built to Ride Along on the Hydra HS335R
This thing is compact and light at right around 15 ounces, so it won't throw off your rifle's balance. The 6061 aluminum housing carries an IP67 waterproof and dustproof rating and is rated to handle recoil up to .50 BMG, so it can live on just about anything you own. It runs on swappable flat-top 18650 batteries, good for roughly 4.5 hours each, and the included QDM150 quick-detach mount lets you pull it off and pop it back on without losing your zero.
Key Specifications
- Manufacturer: DNT Optics
- Manufacturer Part Number: HS335R
- UPC: 850065096476
- Thermal Sensor: 384×288, 12-micron uncooled infrared
- NETD Sensitivity: 18mK or better
- Frame Rate: 50 FPS
- Objective Lens: 35mm F/1.0 Germanium
- Magnification: 3x base, 3-12x digital
- Display: 1024×768 Micro-OLED, 50Hz
- Laser Rangefinder: 5 to 1,300 yards
- Ballistic Calculator: Onboard and DNT app controlled
- Battery: 18650 flat-top rechargeable, approx. 4.5 hours each
- Onboard Memory: 32GB built-in
- Connectivity: WiFi, DNT App
- Recoil Rating: .50 BMG
- Waterproof Rating: IP67
- Weight: Approx. 15 oz
- Dimensions: 7.8 x 2.7 x 2.0 in
What’s Included
- DNT Hydra HS335R thermal scope
- QDM150 quick-detach Picatinny mount
- Eye cup
- Flip-up lens cover
- (2) 18650 flat-top rechargeable batteries
- Battery charger
- (2) USB cables
- Lens cleaning cloth
- User manual and quick start guide
Frequently Asked Questions
Can the DNT HS335R be used as a clip-on in front of a daytime scope?
Yes, the Hydra HS335R runs as a standalone thermal scope, a clip-on, or a handheld monocular. In clip-on mode it works best mounted ahead of low-magnification prism optics or an LPVO, and DNT recommends staying in the lower half of your LPVO's magnification range for the cleanest image. That versatility is the whole point of the Hydra design.
How far can the HS335R rangefinder reach?
The integrated laser rangefinder reads targets from 5 yards out to 1,300 yards. That distance feeds directly into the onboard ballistic calculator, which then gives you holdover corrections for the shot. You can set up your rifle profiles on the unit itself or fine-tune them through the DNT app.
What batteries does the Hydra HS335R use and how long do they last?
It runs on standard flat-top 18650 rechargeable batteries, and the kit comes with two of them plus a charger. Each battery is good for roughly 4.5 hours of runtime, so swapping gets you through a long night. You can also feed it external power over USB-C if you want to stretch a hunt even further.
Does the HS335R hold zero when you take it off the rifle?
It ships with DNT's QDM150 quick-detach mount, which is built so you can pull the unit off and remount it without losing your zero. That makes it easy to switch between rifle-mounted shooting and handheld scanning on the fly. The housing is also rated to handle recoil up to .50 BMG, so it stays put under heavy loads.




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