Thermal binoculars with LRF let you scan with both eyes open, then range the animal without switching devices. Two eyepieces are easier on your eyes during a long sit than a monocular, and a built-in laser rangefinder tells you how far that coyote is before you pick up the rifle. Some models also add features like angle compensation.
Sensor. The Nocpix QUEST S50R has a 1280 sensor, the most detail in this group. The Nocpix QUEST H50R and H35R are 640x512. The Crisp LRF and DNT Hound use 384x288 sensors and keep things smaller.
Lens and base magnification. A 50mm lens reaches farther; a 35mm lens shows a wider view for close fields. The QUEST S50R starts at 2x, the H35R at 3x and the H50R at 4x. Lower base magnification is easier for scanning, higher gets you on a distant animal faster. The Crisp LRF runs 3.25-13.0x on a 35mm lens, and the DNT Hound uses a small 15mm lens for a compact unit.
Brand line. From Pulsar we carry the Merger LRF XL50, Merger LRF XT50 and Merger LRF XQ35 binoculars, plus the Symbion LRF DXR50.
If you'd rather range from the rifle, compare our thermal scopes with LRF. Real people answer the phone at (309) 781-8421 if you want help picking between binoculars and a scope.
A thermal binocular with a built-in rangefinder is the cleanest combo, since one device does the scanning and the ranging. The Nocpix QUEST H50R pairs a 640x512 sensor with a 50mm lens and LRF, and the QUEST S50R steps up to a 1280 sensor. The Pulsar Merger LRF line is another option here.
Start with how far you look. For open fields, a 50mm model like the Nocpix QUEST H50R or Pulsar Merger LRF XL50 reaches out. For timber or smaller fields, the QUEST H35R or Merger LRF XQ35 gives a wider view. All of them range from the binocular.
Look for a high resolution sensor and a big lens. The Nocpix QUEST S50R combines a 1280 sensor with a 50mm lens, so the image holds up when you zoom in on a far animal. The QUEST H50R adds 4x base magnification on a 640 sensor, which gets you close quickly.
Lower base magnification is better for scanning, because you see a wider strip of field. Higher base magnification helps you identify an animal far out without zooming. The Nocpix QUEST line covers both ends: 2x on the S50R, 3x on the H35R and 4x on the H50R.