Discoveryopt HD GEN II 4-24X50SFIR FFP L – Professional FFP Riflescope for Precision Shooting
The Discoveryopt HD GEN II 4-24X50SFIR FFP L is a riflescope built for serious use – equally at home in long-range sport shooting, hunting, and tactical applications. The combination of second-generation HD (High Definition) optics and a first focal plane (FFP) reticle delivers performance that holds up not just on paper, but on the range and in the field.
Optical System and Image Quality
At the heart of this scope is a lens system built from second-generation HD glass, which minimises chromatic aberration (colour fringing) and improves contrast, especially at higher magnifications. The fully multi-coated anti-reflection coating maximises light transmission – a particularly valuable advantage during twilight hunting.
- Magnification — 4–24x, continuously variable
- Objective lens diameter — 50 mm
- Exit pupil — 2.1–8.3 mm (depending on magnification)
- Eye relief — 87–93 mm
- Field of view — 9.6 m–1.5 m / 100 m
FFP Reticle – Why Does the First Focal Plane Matter?
With an FFP (First Focal Plane) layout, the engraved reticle scales proportionally with magnification. This means the MIL subtensions on the reticle represent true, accurate values at every power setting – no mental arithmetic required when switching from, say, 12x to 24x. This is especially important in PRS competition, long-range precision shooting, or fast-changing wind conditions.
The reticle is engraved, not filmed or printed, resulting in more durable and precise lines.
Illumination and Low-Light Performance
The SFIR designation refers to the side focus parallax adjustment and the illuminated reticle. The red illumination is adjustable across 6 brightness levels, making it easy to dial in the right intensity for bright daylight or twilight conditions. The illumination is powered by a CR2032 coin cell battery.
Adjustment System and Turrets
The turrets operate with 0.1 MRAD (1/10 MIL) click increments, allowing precise fine-tuning. The total adjustment range is 32 MRAD in elevation and 17 MRAD in windage – more than sufficient for the corrections needed at long range.
- Click value — 0.1 MRAD per click
- Elevation range — 32 MRAD
- Windage range — 17 MRAD
- Parallax adjustment — 15 yards to infinity, side wheel
The side parallax wheel is easy to operate even with gloves, and precisely fine-tunes focus for the selected shooting distance.
Mechanical Construction and Durability
The tube is a 34 mm one-piece aluminium construction with a Hard Coat Anodized finish. Nitrogen filling prevents internal fogging and condensation. The scope is rated to 1200 G shock resistance, ensuring reliable operation on high-recoil firearms.
- Tube diameter — 34 mm
- Length — 340 mm
- Weight — 953 g
- Waterproofing — IPX7 rated
- Fog-proof — nitrogen filled
- Shock resistance — 1200 G
Recommended Applications
This scope is primarily aimed at shooters looking for a reliable, precise optic for medium to long range. The 4–24x range and FFP reticle are particularly well suited for:
- PRS and F-Class competition shooting — where accurate MIL readings at every magnification are critical
- Big game and predator hunting — at varying distances and in twilight conditions
- Long-range range training — where adjustment range and repeatability matter
Package Contents
The scope ships with: riflescope, dust caps, lens cloth, user manual, specification card, and quality control card. The manufacturer provides a lifetime warranty on the HD series.
