Firefield Nightfall 2 5×50 Gen 1 Night Vision Monocular Review 

 October 20, 2019

By  Miranda Jones

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Last updated on September 17, 2022

Contrary to what you were told growing up, you don’t need to eat carrots to be able to see in the dark. All you need is a night vision monocular.

A night vision monocular is a handy tool that many people don’t want to without, as the ability to see in the dark is so valuable for any number of reasons. It can help with hobbies and in professional applications.

Luckily, unlike in the past, today anyone can get their hands on a night vision monocular. And these days, we’re lucky enough to have a range of different night vision monoculars available for us to choose from without breaking the bank. 

If you’ve been looking for an affordable night vision monocular, we believe that our Firefield night vision 5x50 monocular review will help your make the right purchase decision.

About Night Vision Devices

Night vision devices (NVDs) were originally developed by the United States Army as a tactical advantage tool to be used during warfare. I’m sure you can imagine how valuable it is to have the ability to spot enemies in the dark.

Different types of night vision devices include the focus of today’s article, the monocular, as well as binoculars, goggles, glasses and cameras.

These days, night vision devices aren’t limited to military usage and are used in many different applications, for example law enforcement and civilians. Let’s take a look at some of them. 

What Are the Uses for Night Vision Devices?

  • Wildlife observation 
  • Surveillance and security 
  • Hunting
  • Camping
  • Night fishing and boating
  • Activities like paintball and airsoft

Firefield Nightfall FF24066

Firefield Nightfall 5x50 Night Vision Monocular

Technical specifications:

  • Night vision technology: Gen 1
  • Resolution: 36 lp/mm
  • Magnification: 5x
  • Magnification type: fixed
  • Objective Lens Diameter: 50mm
  • Field of view: 15°
  • Eye Relief: 12 mm
  • Exit Pupil: 5 mm
  • Built-in infrared light
  • Water resistance rating: IPX4
  • Battery life: 20 - 72 hours
  • Battery type: AA
  • Dimensions: 205 x 95 x 60 mm
  • Weight: 15.2 oz

Firefield was founded back in 2009 with the sole purpose of providing high-quality optics and accessories for affordable prices. The release of their Nightfall II was well-received and continues to find its way into the arsenal of many people thanks to its great design, features, durability and, of course, its affordable cost.

Weighing in at 15.2oz with dimensions of 205 x 95 x 60 mm, this device is compact and easy to carry in backpacks or by hand making it a breeze to transport, use & store. 


Black in color, the Nightfall II boasts a fully weather-resistant, easy-grip ergonomic design so that you can use your monocular comfortably in all conditions.

Thanks to its compact design and lightweight properties you’ll never have to worry about this device weighing you down. The high-quality rubber exterior does a good job of ensuring that the device is durable. 

Firefield Nightfall 5x50 Night Vision Monocular

Gen 1 NV Technology

The Nightfall II night vision monocular features Gen 1 technology. Night vision devices that feature Gen 1 technology are the most frequently purchased as they are much less expensive than devices with Gen 2 & Gen 3 technology.

The Firefield Nightfall FF24066 uses Gen 1 technology to produce images of dark areas that you would otherwise be unable to see. While the image that’s produced is somewhat grainy, you’re still provided with the ability to see some details in the dark. This is invaluable in some scenarios. 

Viewing Distance, Resolution and Magnification

The Firefield Nightfall FF24066 has a viewing distance of up to 200 meters with 15° field of view, but its focus is primarily that of close focus range. If a long viewing distance is a must have, you’ll need to consider a different monocular.

As is the case with almost all Gen 1 NV devices, the Firefield Nightfall FF24066 possesses a resolution of 36mm per line. While not the highest resolution on the market, this resolution will suit the needs of most. The Nightfall II possesses a 5x magnification.

Firefield Nightfall 5x50 Night Vision Monocular

IR Illuminator

While the built-in Pulse infrared illumination is necessary for most NV devices, this feature significantly reduces battery life. Regardless of the power consumption, it is a must-have for many hunters.

The Firefield Nightfall FF24066 has an IR wavelength of 805 nm while its intensity measures at 75mW. This will be a handy feature considering the magnification is so high. 


Two AA batteries are required to operate the Firefield Nightfall FF24066. When the Firefield Nightfall FF24066 is used with infrared illuminator, you can expect the battery to last 20 hours. Without IR it will last up to 72 hours.

Please bear in mind that these batteries are not included and will need to be purchased separately. You can purchase these batteries almost anywhere. 

Firefield Nightfall 5x50 Night Vision Monocular


What’s the warranty on the Firefield Nightfall FF24066?

The Firefield Nightfall FF24066 is covered under warranty for a period of 3-years. And if you register your product within 30 days of purchase, your warranty extends to a 5-year period.

What are the mounting options of the Nightfall II? 

On the underside of the Firefield Nightfall FF24066 you’ll find a threaded tripod mount, although many people have no need for this. Its compact build and light weight mean that it’s comfortable enough to carry it for long periods of time.

What’s included with my purchase?

Included in your purchase of the Firefield Nightfall FF24066 is a hand strap, carrying case, cleaning cloth, objective lens cap, the user manual and your warranty card.

Can the Nightfall II be used during daytime? 

Generation 1 night vision devices characteristically can’t be used during the day. Bright lights and direct exposure to sunlight can damage the device, so it’s not recommended to use them during the day. If you need to make use of the Firefield Nightfall FF24066 during the day, make sure to keep the lens cap on and look through the pin hole of the cap in bright conditions.

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Final Thoughts

For the price you pay, the Firefield Nightfall FF24066 is a product that ticks most of the necessary boxes that a night vision monocular should. 

It’s evident that a lot of thought went into its ergonomic design, which is why it stands out from the rest. Finishing touches like the built-in infrared illuminator, decent viewing capabilities and its massively attractive price solidify this is a firm favorite on the market.

Now, tell us your thoughts after testing it out.

About the author 

Miranda Jones

Miranda Jones is Smart Scouter's Product Research Manager. Miranda ensures that Smart Scouter stays at the forefront of thermal and night vision technology and knowledge so that our readers know they are getting the most up-to-date information. Miranda has been involved in the thermal industry in various capacities for 12 years. Miranda is a graduate of the University of Ohio and in her spare time enjoys camping and traveling across the US.

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