SKU: 20188891645

Firefield 10x50 Siege Monocular (Black)

Sale price$4963.50 Regular price$5515.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Firefield 10x50 Siege Monocular (Black)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

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
  • 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
In the Box
Firefield 10x50 Siege Monocular (Black)
  • Wrist Strap
  • Nylon Carrying Case
  • Eyepiece Cap
  • Tethered Objective Lens Cap
  • Limited 3-Year Warranty
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

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 20188891645

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.0 ★★★★★
Based on 2215 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
J. Willis
Grantham, US
★★★★★ 5
Great Fit and Style
Color: Red, Size: Large
This shirt is very comfortable. It fits very well and is of good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
A
Verified Purchase
Alex
Louisville, US
★★★★★ 5
Great product, would highly recommend
Color: White, Size: Small
Fits great. Very light and breathable material. Very easy to wash and stains come right out
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
R
Verified Purchase
Rafael
Omaha, US
★★★★★ 4
Nice
Color: Navy Blue, Size: X-Large
This is a light and airy, woven shirt. Looks awesome and fits well. Pairs well with jeans and sneakers for a casual look or slacks for a business casual look. I recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2025
J
Verified Purchase
jeffrey
Bozeman, US
★★★★★ 5
Great shirt.
Color: Cream, Size: Medium
Fits excellent.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
Jacob Cosmeus
Port Orchard, US
★★★★★ 5
Good quality 😍
Color: Ice Green, Size: Large
I really like this shirt! The knit material feels soft, breathable, and perfect for warm weather. The design looks stylish and modern, exactly like the pictures. It fits true to size and sits really nice on the body—comfortable but still fitted enough to look clean. Great for summer outings, brunch, or beach vibes. Definitely worth the purchase
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 19, 2025

recommand products