Firefield Nightfall II Gen 1 5x50 Night Vision Monocular

Firefield Nightfall II Gen 1 5x50 Night Vision Monocular

Firefield Nightfall II Gen 1 5x50 Night Vision Monocular

B&H # FI250X50NFM MFR # FF24066
Special Order
Expected availability: 7-14 business days

Product Highlights

  • 1st Generation Itensifier
  • 50mm Objective Lens
  • 5x Magnification & 15° AFOV
  • Integral IR
  • 3.3' Minimum Focus
  • Coarse and Fine Focusing
  • Diopter Adjustment
  • Rubberized Armoring
  • Water Resistant
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Firefield FF24066 overview

  • 1Description

The Nightfall II from Firefield is a Generation 1 handheld night vision monocular with a built-in infrared illuminator, a wide angle of view, and a comfortable slip-free grip. Its electro-optics feature a Generation 1 intensifier tube with a resolution of 36 lines per millimeter and a pulsed illuminator emitting at a wavelength of 805 nm, which is outside visible spectrum. The infrared illuminator allows you to illuminate your target and make your observations in complete darkness while you remain unseen. This way, at night, you can use this night vision monocular to watch live animals on your backyard, or see intruders and trespassers on your property as far away as 197 yards. The viewing experience is enhanced with a 15° wide angle of view, 5x magnification, and 50mm objective which increases light gathering capacity. Additionally, monocular features a 5 mm exit pupil for better visibility at night, and a 12 mm eye relief to accommodate viewing with eye glasses.

Beyond optical performance, the monocular features a number of convenience features. The objective cup has a rubberized ribbed texture and can be rotated to adjust coarse focus from infinity to a minimum of 3.3'. Once you have made your coarse adjustments, you can use the diopter adjustment to fine-tune your focus. The water resistant housing protects your device from splashing water like rain and sprinklers, the rubberized armoring provides a secure non-slip grip, and slender body allows you to hold it with one hand and access to menu buttons at the same time. Also included with the monocular are a hand strap, a carrying case, and a cleaning cloth.

Optical Performance

  • Intensifier: Gen 1
  • Magnification: 5x
  • Resolution: 36 lp/mm
  • Close focus range of 1 meter
  • Angular field of view: 15°
  • Diopter adjustment: ± 5
  • Exit pupil: 5 mm
  • Eye relief: 12 mm

IR Performance

  • Infrared illuminator helps you stay undetected
  • High rate pulsed operation extends battery life
  • Wavelength: 805 nm
  • Beam divergence: 9°

Use and Handling

  • Use objective cup for a coarse focusing
  • Use diopter adjustment for fine focusing


  • Rubberized armoring provides non-slip grip
  • Water resistant against splashing water
UPC: 810119018960
In the Box
Firefield Nightfall II Gen 1 5x50 Night Vision Monocular
  • Hand Strap
  • Carrying Case
  • Cleaning Cloth
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    Firefield FF24066 specs

    Intensifier Tube Generation I
    Magnification 5x
    Lens System 50mm
    Angular Field of View 15°
    Linear Field of View 786' @ 1000 yd (262 m @ 1000 m)
    Minimum Focus Distance 3.3' (1 m)
    Diopter Adjustment ± 5
    Exit Pupil 5 mm
    Eye Relief 12 mm
    Infrared Illuminator Type: Infrared
    Wavelength: 805 nm
    Operation mode: pulsed
    Beam divergence: 9° minimum
    Resolution 36 lp/mm
    Battery / Runtime 2 x AA / Without IR: 72 hr, With IR: 20 hr max
    Range 197 yd (180 m)
    Weatherproofing Water resistant - rated IPX4
    Dimensions 8 x 3.7 x 2.4" (20.5 x 9.5 x 6 cm)
    Temperature Range -4 to 104°F (-20 to 40ºC)
    Weight 15.2 oz (431 g)
    Packaging Info
    Package Weight 1.15 lb
    Box Dimensions (LxWxH) 8.4 x 4.4 x 3.0"

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