Vector Optics Sentinel 10‑40x50 SFP E‑SF Riflescope – Benchrest Precision & Field‑Ready Versatility

The Vector Optics Sentinel 10‑40x50 (SCOL‑58) is a high-power second focal plane (SFP) riflescope crafted for precision shooting—from 25 m benchrest to field-target and tactical use. Its true 10×–40× magnification, combined with a high-performance COM‑25M etched reticle, delivers remarkable clarity and accuracy in a compact yet rugged package.

High‑Throughput Optics & True 4× Zoom

Equipped with a fully multi-coated 50 mm objective, the Sentinel delivers bright, high-contrast images across its entire zoom range. The specified clarity holds steady even at 40×, making it ideal for tight group shooting and small target work.

COM‑25M Center Dot Reticle

Designed specifically for 25 m benchrest use, the COM‑25M features a crisp 1.5 mm center dot at 40× that aligns perfectly with standard bullseye targets. Its fine lines remain constant across all magnifications thanks to its SFP placement.

Tactical and Precision Features

• 1/8 MOA click turrets: Graduated, audible adjustments with 50 MOA travel and a zero-stop function.
• Side-focus/parallax: Adjustable down to 10 yds with clearly marked distances (10/20/25/30/40/50/60/75/100/150/200/500/∞), ensuring focused clarity.
• Turret lock: Pull-to-adjust then push-to-lock prevents accidental drift during transport or use.

Robust Construction & Ergonomics

• 30 mm 6061‑T6 aluminum tube: Shock‑tested up to 750 G and sealed via nitrogen purge—waterproof and fog-proof.
• Diopter focus: Fast-focus eyepiece offering –2 to +1.5 correction.
• Eye relief: A safe and generous 90–92 mm suited for high-recoil calibers.
• Field of view: 10.2 ft (3.1 m) at 10× to 2.6 ft (0.8 m) at 40× (@100 yds).

Compact but Capable Design

Measuring 405 mm in length and weighing around 750‑795 g, the Sentinel balances portability with performance. Key build dimensions include a 77 mm distance from objective to turret, 38 mm turret section, and 56 mm spacing to the magnification ring—designed for quick and repeatable handling.

Complete Accessory Package

• 30 mm Picatinny scope rings and flip-up lens caps
• Honeycomb sunshade to reduce glare
• Cleaning cloth, user manual, turret-zero tool—all packaged in a retail-ready box

User Feedback & Field Performance

Enthusiasts consistently praise the Sentinel for offering “surprisingly clear glass for the money,” making it a standout affordable option for benchrest and field-target shooters. The thin reticle and fine center dot shine brightest at high magnification, though some users note slight edge blur and a narrower eyebox at 40×.

Technical Specifications

Suitable For

• 25 m benchrest competition & sports shooting
• Field-target and precise airgun use
• Tactical engagements using small-caliber rifles
• Entry into long-range shooting without premium price tag

Summary

The Vector Optics Sentinel 10‑40x50 SFP delivers precision optics, solid mechanics, and benchrest-grade reticle design without the premium price. With real-world reliability, repeatable adjustments, and a feature-rich package—it's a benchmark pick for first-time high-power scopes and budget-conscious marksmen.