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Thermal sensor resolution. What you need to know!

Watch this video and you will be better informed than many self procalimed thermal experts. Paul Alisauskas, FYRLYT's lead thermal designer, offers a key insight that clears up common confusion about thermal sensor resolution. His expertise highlights a critical point: Thermal sensor size DOES NOT dictate thermal sensor resolution.

 

Understanding this is crucial because people easily misunderstand what's truly important in thermal imaging. This knowledge can actually save you thousands of dollars by helping you avoid overpaying for unnecessary features based on size misconceptions. FYRLYT wants to give you the real facts, based on science, so you can check for yourself and make smart choices for your specific needs.
 

FTO 384-50: High-Performance 384x288 Thermal Riflescope

Introducing the FYRLYT FTO 384-50, the thermal riflescope that delivers exceptional performance and outstanding value. Utilising the same robust housing and precision engineering as our FTO 640-50 model, the 384-50 is the smart choice for professional and recreational users who want premium features without paying for resolution they may not need.

For many real-world applications, a high-quality 384x288, 12µm sensor paired with a 50mm F1.0 Germanium lens provides the optimal balance of performance and cost. This scope is engineered to deliver target identification capabilities that can rival more expensive models, and we explain how below.

 

Is a 384 Sensor Right for You? Understanding Real-World Performance

The thermal market often suggests that a higher resolution sensor (e.g., 640 or 1024) is always better. However, this is not the complete picture. The most important factor is how the scope performs for your typical use. For many hunting and observation scenarios, especially at moderate to long ranges using magnification, a 384 sensor delivers the same effective resolution on target as a 640 scope.

The key technical points to understand are:

  • Resolution (PPD): The FTO 384-50 provides the same angular resolution (PPD - Pixels Per Degree) as any scope with an identical lens and pixel spacing. When you zoom in, the detail you see on a distant target is comparable.

  • Field of View (FOV): The primary difference is that a 384 sensor has a tighter Field of View at its base (native) magnification compared to a 640 sensor.

  • Conclusion: If you typically operate with magnification and do not require an ultra-wide field of view for very close-range scanning, the FTO 384-50 offers the same practical performance as scopes costing thousands more.

 

Precision Engineering: Fine .20 MOA Click Adjustment

A key feature that sets the FTO 384-50 apart from other scopes in its class is its exceptional zeroing precision. While many thermal scopes have coarse click values of .47 MOA (approx. 13mm at 100m) or more, the FTO 384-50 features the same fine adjustment as our flagship model.

With a click value of just .20 MOA (approx. 5.6mm at 100m), you can zero your rifle with the accuracy of a high-end day optic. This ensures your point of aim is your point of impact, providing a critical advantage in the field.

Expert Consultation: Get the Right Scope for Your Needs

(P1) Still not sure if a 384 or 640 sensor is right for you? Contact the FYRLYT design team directly. We will provide honest, factual advice based on science and field experience, not marketing hype. We want to help you make the most intelligent investment for your specific needs.

User Support & Resources

We recommend watching our instructional videos to familiarise yourself with the intuitive menu structure and functions before mounting the scope. For optimal battery health and performance, please ensure the scope is charged for a minimum of three hours before its first use.

A comprehensive 12-page PDF instruction manual is also available for download. If any questions arise during setup or use, remember you are speaking directly with the designers who were integral to the scope's development, ensuring you receive prompt and expert support.

Download FTO 384-50 Instruction Manual PDF

Pricing & International Orders

  • Australia (AUD): $3899

  • New Zealand (NZD): $4323

  • United States (USD): $2423

  • Europe (Euro): €2352

  • South Africa (ZAR): R45,540

​Please note: Prices in foreign currencies are estimates and subject to exchange rates at the time of purchase. The final price will be displayed in our online store. It is the purchaser's sole responsibility to verify and comply with all local laws, import duties, and taxes related to purchasing a thermal riflescope in their region. FYRLYT assumes no responsibility for these matters.

FYRLYT FTO Thermal Scope Customer Feedback

"What a pleasure to use. Going from an older Pulsar thermal, this scope is very easy to navigate and use. The picture quality is exceptional!" - Sam

"Awesome product and amazing customer support. These guys go above and beyond to look after their customers. My new thermal scope is a game changer! Love it!!!" - Toby Grumbridge

FTO MENU OVERVIEW

Paul Alisauskas presents an overview of understanding the functionality of the MENU SYSTEM in the FTO 640-50 / FTO 384-50  (procedure is identical with the FTO 384-50) thermal rifle scope. We recommend purchasers to familiarise themselves with the basic menu navigation straight out of the box even before mounting the optic. The menu system and 'steps' are intuitive once the basics are understood.

 

1: The scope is turned on by the BLUE pad button on top of OCULAR assembly.

2: The menu is activated by pushing/depressing the top turret.

3: Adjustments are made by TURNING the same turret.

Paul Alisauskas presents part 2 of bore sighting and sighting in the FTO 640-50 rifle scope (procedure is identical with the FTO 384-50). We recommend purchasers familiarise themselves with the basic menu navigation straight out of the box even before mounting the optic. The menu system and 'steps' are intuitive once the basics are understood.

We recommend bore sighting in a controlled environment with no distractions. The firearm must be supported by either bags and or a bipod. Ideally, this can be done before venturing into the field for final sighting with live ammunition.

 

Remember you can save different setting profiles for different loads or swapping between rifles via QD mounting systems.
 

1: The scope is turned on by the BLUE pad button on top of OCULAR assembly.

2: The menu is activated by pushing/depressing the top turret.

3: Adjustments are made by TURNING the same turret.

FTO 384-50 Features overview

  • 384x288 pixel array 12μm pixel pitch

  • NETD: ≤35mk(25 °C, F#=1.0)

  • 50mm F1.0 lens (Germanium) 

  • 5X base optical - *40X (1-*8X digital)

  • 0.49inch (12.4mm) OLED 1440*1080 resolution display

  • 0.2MOA click value adjustment

  • Built-in Photos/videos recording functions with WIFI

  • Alloy housing, protection IP67

  • 30mm tube

  • 5 customisable user profiles

  • 10 reticles

Image details

  • Focal Length: 50mm

  • FOV (field of view): 5.3°*4.0°

  • Minimum Focus: 5m

  • Lens Aperture: F1.0

  • Frame Rate: 50Hz

  • Focus: Manual objective

Display Details

 

  • Display: 0.49" (12.4mm) Colour OLED 1440x1080 Resolution

  • Exit Pupil Diameter: 6mm

  • Exit Pupil Distance: 65mm

  • Magnification: 2.72X

  • Diopter: Adjustable,-5D~+5D

Thermal Imaging Parameters

  • Brightness: Adjustable

  • NUC: Auto/Manual

  • Display Palettes: (5) Black/White/Green/Iron/Red Hot

  • Digital Zoom: 1.0X~8.0X (viewed as 5X - 37X)

  • Reticle: 10 options

  • Hot Spot Track: Supported

  • PIP (picture in picture): Supported

  • Bad Pixel Correction: Supported

  • Wifi: Support AP/WLAN

Memory & Image Capture

  • Capacity: 32GB (internal)

  • Audio Record: Supported

  • Impact Video Recording: Supported

  • Recording Type: Photo & Video

Power Supply

  • Battery Type: Built in type plus external Battery (CR123*1)

  • Power Status Indicator: Yes

  • Working Time: ≥15Hours

Environment

  • Shock Resistance: 6000J (300 Win Mag)

  • Vibration Resistance: 2g,GB/T2423.10(IEC60068-2-6)

  • EMC: CE Compliant

  • Humidity: 0~95%

  • Working Temperature: -30℃~+55℃(-22°F to131°F)

Physical

  • Housing: Aluminium 30mm main tube 50mm objective

  • Finish: Hard Anodised (black)

  • Encapsulation: IP67

  • Dimensions: 368.2×84×77.2mm

  • Weight: 1020g

Interface

  • Power Supply: Type-C interface (Charging, Data Transmission, External Video output)

Detection Distance

 

  • Human (1.8×0.5m): 2600m

  • Vehicle (2.3×2.3m): 3200m

Recognition Distance

  • Human (1.8×0.5m): 1150m

  • Vehicle (2.3×2.3m): 1600m

Palettes, 'OSD' customisation & custom profiles

The 'OSD', on screen display is customisable to show the information you prefer including not only a choice of ten reticles but reticle colours. The display image can be easily enhanced to suit the environmental thermal conditions. Additionally you have the option of five individual preset profiles. This is especially useful if transferring the scope between platforms retaining the preset zero data and other parameters set by you.

FYRLYT FTO 640 THERMAL PALETTES

FTO Thermal Scope Consultation

  • This CONSULTATION is obligation free and does not commit you to purchase.

  • Paul will ring you to discuss any questions and there will be no sales pressure or subsequent calls. FYRLYT does not employ any salespeople. We are here to assist you make the right decision for your needs whether it be a FYRLYT product or not.

  • Your information is confidential and will not be shared.

FYRLYT FTO-640 SCOPE
CONSULTATION

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