The Alpen Optics ApexThermal Monocular 35mm is a high-performance thermal imaging device designed for serious outdoor enthusiasts, particularly hunters and those requiring reliable night observation. It's lauded for its ability to deliver sharp, high-resolution thermal images even in complete darkness, fog, or rain, thanks to its sensitive 384x288 thermal sensor and HD AMOLED display. Key features include a respectable detection range of up to 1,300 meters, versatile color palettes, and advanced image optimization technologies like Clear+. Users appreciate its robust, weather-resistant construction, long battery life (with included spare), and smart features like Wi-Fi for live streaming and a built-in video recorder. While a premium product, it's generally seen as a valuable tool for enhanced situational awareness in challenging conditions.