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
| Parameter |
Value |
| Magnification |
10–40× |
| Objective Lens |
50 mm FMC |
| Reticle |
COM‑25M etched glass (SFP), 1.5 mm center dot at 40× |
| Click Value |
1/8 MOA |
| Elevation/Windage Range |
50 MOA each |
| Parallax |
10 yd to ∞ (multi‑mark) |
| Eye Relief |
90–92 mm |
| FOV (@100 yd) |
10.21–2.61 ft (3.1–0.8 m) |
| Tube |
30 mm, 6061‑T6 Al |
| Length/Weight |
405 mm / 750–795 g |
| Shock/Fog/Waterproof |
750 G / nitrogen‑purged / IPX4 |
| Illumination |
None (center dot only) |
| Diopter Adjustment |
–2 to +1.5 |
| Accessories |
Rings, sunshade, caps, cleaning cloth, tool |
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.
