Siege 10x50R Tactical Monocular

SKU# FF12004T

  • Sales Price:   $79.97
  • Regular price $91.97

The Firefield Siege 10x50R is a tactical monocular perfect for viewing targets at long range. With fully multi-coated optics and an IP67 waterproof rating, the Siege 10x50R remains safe from outdoor elements. Featuring internal focusing and a rangefinding reticle, this tactical monocular allows for clear viewing and quick target distance identification. The Firefield Siege Monocular takes advantage of its twist-up eyecup to ensure ease of use for individuals with eyeglasses. The roof prism optical system is made from high-density BAK-4 glass, which eliminates distortion around the edge of the exit pupil when viewing.

Included in Package

  • Lanyard
  • Objective lens cap
  • Carrying case
  • Lens cloth


  • Tactical monocular
  • 10x magnification
  • 50mm objective lens diameter
  • BAK-4 glass prism
  • IP67 waterproof rating
  • Fully multi-coated optics
  • Internal focusing
  • Rangefinding reticle
  • Roof prism optical system
  • Twist-up eyecup

EXPORT CONTROL NOTICE: This product is controlled for export and in-country transfer under the Export Administration Regulations (EAR). division contrary to U.S. law prohibited.

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Magnification 10
Diameter, Objective Lens 50mm
Type of Prism (type) Roof/BAK4
Prism Coating, (yes/no) Yes
Lens Coating Fully multi-coated
Focusing Lens, Eye/Obj/Int Internal
Diameter, Exit Pupil 5.6
Eye relief (in/mm) .6/15.4
Field of View, degree 7
Field of View (ft/1,000yds) 367.21
Field of View (m/1,000m) 122
Close Focus Distance 13/4
Relative Brightness 22.4
Twilight Index 31.4
Resolution 2.3
Range, Diopter 0
Waterproof/Nitrogen-filled Yes
Fog Proof Yes
IP Rating (waterproof) IP67-submersible to 1m/3ft
Eyecup system Twist-up
Body Material Plastic/rubber
Length (in/mm) 6.2/157
Width (in/mm) 2.2/56
Height (in/mm) 2.6/66
Weight, oz 15.2
Operating temperature, F/C 0 to 120 / -17 to 49