Fortuna General 40L3 Thermal Imaging Monocular

• 384x288 thermal sensor with 17 μm pixel pitch: delivers a practical balance of image detail, detection capability, and manageable device size for handheld thermal observation at short to medium distances.
• 40 mm F1 objective lens: gathers thermal energy efficiently, helping the monocular maintain a clearer image and stronger target separation in poor weather, at dusk, and during night use.
• 800x600 AMOLED display: presents the thermal image with good contrast and a comfortable viewing experience, which reduces eye strain during longer scanning sessions.
• 2.0x to 10.5x magnification range: lets the user move from wider-area searching to closer target inspection without changing devices, which is useful when identifying heat sources at varying distances.
• Silent calibration and WiFi connectivity: silent calibration avoids the distraction of audible shutter noise, while WiFi adds a convenient way to connect the device for viewing or sharing footage.

About the Fortuna General Series

Fortuna General is a family of compact thermal scopes and monoculars built for short- and medium-range use. Within the Fortuna lineup, the General series sits as a versatile platform for users who need thermal capability for observation as well as, in some configurations, weapon-mounted use. The series is designed around practical field handling rather than excessive bulk, which makes it suitable for hunting, night shooting, and general thermal surveillance.

Across the range, General models are offered with 384 × 288 or 640 × 480 sensors, all using a 17 μm pixel pitch. Fortuna also lists 25 mm, 40 mm, and 50 mm lens variants, allowing the series to cover wider scanning roles as well as longer-reaching observation. Shared design features include a rubberized aluminum housing, waterproof construction, an 800 × 600 AMOLED display, and automatic silent calibration. Fortuna also describes the series as resistant to recoil from large-caliber firearms, which reflects a mechanically robust design philosophy even on models used primarily as handheld thermal devices.

About the Fortuna General 40L3 Thermal Imaging Monocular

The Fortuna General 40L3 Thermal Imaging Monocular is configured for users who need a thermal handheld with enough reach for detection work while still remaining compact enough for regular field carry. Its 384x288 microbolometer sensor, 17.00 μm pixel pitch, and 50.00 Hz refresh rate give the image a stable, natural look when scanning moving animals, people, or vehicles. With a stated detection range of 1100.00 m, the 40L3 is suited to locating heat signatures well before they are close enough for visual confirmation.

The 40.00 mm F1 objective lens plays an important role in how the monocular performs in the field. A fast lens helps the device collect more thermal information, which supports better contrast and target separation in difficult conditions such as cold backgrounds, damp air, or low-visibility night use. The 2.00 x base magnification gives a useful starting point for observation, while the 10.50 x maximum magnification allows closer inspection of a detected heat source when more detail is needed.

Viewing comfort is also a strong part of the design. The 800x600 AMOLED display provides a crisp, high-contrast image, and the -5/+5 diopter adjustment helps adapt the eyepiece to different eyesight requirements. Silent calibration keeps operation discreet, which matters when observing in quiet surroundings. With WiFi connectivity, image capture, video recording, and video output, the monocular also supports documentation and remote viewing tasks. Its IPX-6 waterproof rating, rubberized body, and operating range of -30 / + 50 °C make it suitable for demanding outdoor use across changing weather and terrain.

About Fortuna

FORTUNA is a Russian manufacturer of thermal imaging devices focused on hunting, night shooting, and sport shooting applications. The FORTUNA trademark was registered in 2010, and the company produces thermal imagers at LLC Modul in Moscow, Russia. In addition to hardware, Fortuna develops software for its own products, which shows a vertically integrated approach to thermal device design.

The company’s catalog includes thermal sights, monoculars, binoculars, and clip-on attachments, with the General line covering short- and medium-range use. Fortuna also notes that General devices use electronic silent calibration, a feature that is especially relevant in thermal observation products where quiet operation and uninterrupted viewing are important. The brand is therefore best understood as a specialist maker of dedicated thermal optics rather than a general sporting optics manufacturer.

Main Features

• Magnification: 2.00 x
• Magnification Range: 2.00 x - 10.50 x
• Objective Lens Diameter: 40.00 mm
• Lens Aperture: F1
• Field of View: 162.00 m/1000m
• Field of View (Degrees): 9.30 °
• Eye Relief: 25.00 mm
• Close Focus: 10.00 m
• Diopter Adjustment: -5/+5
• Detection Range: 1100.00 m
• Thermal Sensor Type: Microbolometer
• Thermal Sensor Resolution: 384x288
• Pixel Pitch: 17.00 μm
• NETD: 60.00 mK
• Refresh Rate: 50.00 Hz
• Calibration Mode: Silent
• Display Type: AMOLED
• Display Resolution: 800x600
• Image Capture: Yes
• Video Recording: Yes
• Video Output: Yes
• Connectivity: Wifi
• Battery Type: CR123A
• Battery Life: 5.00 h
• Waterproof Rating: IPX-6
• Fogproof: Yes
• Operating Temperature Range: -30 / + 50 °C
• Dimensions: 225.00 mm x 72.00 mm x 55.00 mm
• Weight: 620.00 g
• Color: Black

Warranty

Fortuna provides a 2-year warranty for this thermal monocular. That period matches the stated manufacturer warranty for the product and suits a device built for regular outdoor thermal observation use.