Firefield 10x50 Siege Monocular (Black)

Firefield 10x50 Siege Monocular (Black)

Firefield 10x50 Siege Monocular (Black)

B&H # FI10X50SM MFR # FF12004
Firefield 10x50 Siege Monocular (Black)

Firefield 10x50 Siege Monocular (Black)

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Expected availability: 7-10 business days

Product Highlights

  • Compact BAK4 Roof Prisms
  • Fully Multi-Coated Optics
  • Wide 70° Apparent Angle of View
  • IP67-Rated, Dust and Waterproof
  • Lightweight Plastic Chassis
  • Nitrogen-Filled, Fogproof
  • Textured Black Rubber Armoring
  • Large User-Facing Focusing Knob
  • Tripod Mountable via 1/4"-20 Mount
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Firefield Siege overview

  • 1Description

Firefield's black 10x50 Siege Monocular is designed as a highly portable field optic for long-range use even in challenging light conditions. The combination of magnification and objective lens diameter ensures an ultra-wide 70° apparent angle of view and a large exit pupil, with enhanced light gathering ability versus smaller comparable models. Added to these features are anti-reflection fully multi-coated optics and BAK4 roof prisms which maximize light transmission through the optical path, producing bright and clear high-contrast images with accurate color rendition.

The housing is made of a lightweight and durable plastic that is wrapped in a protective black rubber armor. Accents on the armor promote a more secure grip, helping to increase its handling in cold and wet weather. The optical tube is O-ring sealed to an IP67-rating making it dustproof, and submersible to a depth of 3.3' (1m) for up to one hour. The optical tube is also nitrogen-filled to be resistant to internal fogging during extreme changes in temperature and environmental conditions. Despite its size and weight the performance capabilities of this optic, when combined with the standard 1/4"-20 tripod mount, make the Siege an ideal highly portable spotting scope in the field, at the range, or in a blind.

Easy to carry and use, these optical and design features result in an optic that presents an immersive observational experience in all light and weather conditions.

Optical Performance
  • High 10x magnification enables detailed observations of distant subjects
  • Large 50mm objective lens diameter draws in copious amounts of light to boost its light-gathering ability in challenging conditions such as at dawn and dusk
  • Compact BAK4 roof prisms deliver a round exit pupil, and a crisp and clear image with limited edge distortion
  • Anti-reflection fully multi-coated optics produce views with improved color rendition, contrast, and clarity
  • Ultra-wide 70° apparent angle of view minimizes the appearance of visible hand shake that is common when holding high-power optics
  • 367-foot field of view at 1000 yards
Use and Handling
  • Large textured user-facing focusing knob is easy to find and manipulate without looking and when wearing gloves
  • Convenient twist-up rubber eyecups for comfortable use with or without eyewear
  • Standard 1/4"-20 tripod mount allows for hands-free use to reduce fatigue and hand shake that can interfere with viewings
  • Long 15.4mm eye relief helps to reduce eye strain and improve viewing comfort
  • Wide 5mm exit pupil will completely cover most pupils as they open and dilate as light fades
Construction Details
  • Lightweight and impact-resistant plastic chassis
  • Nitrogen-filled to be resistant to internal fogging when moving through extreme variations in temperature and conditions
  • O-ring sealed to a dust and waterproof IP67 rating, making it submersible to 3.3' (1m) for up to 1 hour
  • Textured black rubber armor protects against impacts while providing a slip-resistant grip
  • Integrated accents add grip strength and stability for sure handling
  • Tethered objective lens cover allows for easy use without the threat of loss
  • Broad 0 to 120°F (-17 to 49°C) operating temperature
  • Weight: 15.2 ounces
UPC: 812495022609
In the Box
Firefield 10x50 Siege Monocular (Black)
  • Wrist Strap
  • Nylon Carrying Case
  • Eyepiece Cap
  • Tethered Objective Lens Cap
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    Firefield Siege specs

    Prism Type Roof
    Magnification 10x
    Objective Lens Diameter 50mm
    Angle of View 7.0°, actual
    Field of View 367' @ 1000 yd / 122 m @ 1000 m
    Minimum Focus Distance 13.0' / 4.0 m
    Exit Pupil Diameter 5.0 mm
    Eye Relief 15.4 mm
    Dioptric Correction None
    Tripod Mount Yes (built-in)
    Dimensions 6.2 x 2.6 x 2.2" / 15.7 x 6.6 x 5.6 cm
    Weight 15.2 oz / 430.9 g

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