Discovery Optics HS 4-16x44SFIR FFP – Reliable Precision Optics for a Wide Range of Shooters

The Discovery Optics HS series was designed for shooters who want the advantages of a First Focal Plane (FFP) scope without paying a premium price. The HS 4-16x44SFIR FFP is a well-built, rugged rifle scope equally at home on a hunting rifle, a precision sport shooting setup, or a high-powered PCP air rifle.

FFP Reticle – Accurate at Every Magnification

The engraved DLT MOA reticle sits on the First Focal Plane, meaning it scales with the image as magnification changes. This ensures that all holdover and windage markings remain true at any power setting — not just at a fixed magnification. This is especially valuable when shooting at varying distances or when conditions require quick magnification changes without recalculating corrections.

The center of the reticle is illuminated in red (center illumination), providing improved contrast against dark backgrounds, targets in shade, or during low-light conditions at dusk and dawn.

Side Parallax from 10 Yards

The left-side parallax adjustment wheel allows precise focus from as close as 10 yards (approx. 9.1 m) out to infinity. This feature is particularly useful for PCP airgunners who shoot at short distances with precision requirements, as well as for hunters who need flexibility across a wide range of target distances.

Push-Zero Lock Turrets – 1/4 MOA Click Value

The exposed turrets feature a Push-Zero Lock system: once zeroed, the position is locked with a simple push-down action, preventing accidental movement. The 1/4 MOA click value allows fine adjustments, while the total adjustment range of 80 MOA in both elevation and windage provides ample travel for most shooting scenarios.

Optical Quality and Mechanical Construction

The tube is machined from a single piece of aircraft-grade aluminium alloy, 30 mm in diameter. The optics use lanthanum glass with multi-layer green coating, minimising light reflection and delivering a bright, clear, and high-contrast image in all lighting conditions.

• OF (Objective Fixed) lens retention system — military-grade, capable of handling heavy recoil including .50 calibre
• Nitrogen-filled with quality seals — 100% waterproof and fogproof performance
• Shockproof construction — solid machined erector system ensures long-term mechanical stability
• Eye relief — 80–90 mm for comfortable use across different rifle platforms
• Exit pupil diameter — 10.8–2.7 mm across the 4x–16x magnification range

Key Specifications

Magnification: 4x–16x • Objective lens: 44 mm • Tube diameter: 30 mm • Focal plane: FFP (First) • Reticle: engraved DLT MOA, center illuminated • Click value: 1/4 MOA • Adjustment range (E/W): 80–80 MOA • Parallax: 10 yards – infinity (side) • Length: 352 mm • Weight: 768 g • Warranty: 3 years

Who Is This Scope For?

The Discovery Optics HS 4-16x44SFIR FFP is an excellent choice for any shooter looking for a dependable FFP scope without compromise on reticle quality, but without the need to spend premium-tier money. It suits hunters who shoot at varying distances and want to benefit from a first focal plane reticle; sport shooters who require precision aiming; and PCP airgunners who need sharp parallax correction from as close as 10 yards. If you're looking for a capable, honest mid-range scope that delivers where it counts, this Discovery HS is well worth considering.

What Users Are Saying

Based on international shooting and airgun forums, the Discovery HS series consistently receives positive feedback. Users highlight the surprisingly strong price-to-performance ratio, with the lanthanum glass delivering clear and contrasty images. Many shooters use these scopes successfully on PCP air rifles and .22 rimfire platforms. One user described the Discovery HS line as "a safe bet for those who don't mind a slightly larger size and weight," while another noted that "the value for money is outstanding and build quality rivals Arken-level optics." Discovery Optics has built a solid reputation in the mid- to upper-mid-range segment of affordable precision optics.