DiscoveryOpt HD GEN II 5-30×56 SFIR – Versatile Riflescope for Long Range
The HD GEN II 5-30×56 SFIR is part of DiscoveryOpt's second-generation HD series, purpose-built for long-range hunting and precision shooting. The 34 mm one-piece aluminium tube delivers outstanding rigidity and impact resistance, while the compact 380 mm length and 1080 g weight keep it practical in real field conditions.
Optical System and Image Quality
The scope features an upgraded HD optical system with fully multi-coated lenses that reduce light scatter and chromatic aberration, delivering a sharp, clear image even at maximum magnification. The 56 mm objective lens gathers ample light, making it particularly effective during low-light hunting at dawn or dusk. Exit pupil diameter ranges from 9.3 mm at 5× to 1.9 mm at 30×.
FFP Reticle and Illumination
The glass-etched First Focal Plane reticle scales proportionally with the image at every magnification level. This means MRAD-based range estimation and wind correction can be applied at any zoom setting without conversion tables. The six-level red illumination supports target acquisition in low-light and dark conditions.
ZeroStop Turret and Adjustment Range
The elevation turret features a ZeroStop mechanism that physically stops the turret at the zeroed position when dialled back down. This allows fast, reliable return-to-zero in the field without counting clicks. Adjustment specifications:
- Elevation — 33 MRAD (116 MOA) total travel
- Windage — 17 MRAD (60 MOA) total travel
- Click value — 0.1 MRAD (approx. 1 cm / 100 m)
The generous elevation range is especially useful when shooting without a canted rail, or when compensating for significant bullet drop at very long distances.
Side Parallax Adjustment
The side-mounted parallax adjustment knob allows precise focus correction matched to the target distance. The minimum parallax setting is 25 yards (~23 m), making the scope suitable for a wide range of shooting distances.
Build and Weather Resistance
- Tube — one-piece aerospace-grade aluminium, 34 mm diameter
- Nitrogen purged — prevents internal fogging
- Waterproof — fully sealed construction
- Shock resistance — tested up to 1200 G
- Length / Weight — 380 mm / 1080 g
Package Contents
The scope ships with a sunshade, flip-up lens caps, cleaning cloth, cleaning pen, user manual, specification card, QC inspection card, and a fully transferable lifetime warranty card. The DiscoveryOpt HD series is covered by a lifetime warranty.
Who Is This Scope For?
The DiscoveryOpt HD GEN II 5-30×56 SFIR is best suited for long-range hunters targeting big game or predators, and for precision shooters practising at distances of 600 m and beyond. The combination of a ZeroStop turret and an FFP reticle makes it an excellent choice for anyone who needs fast, confident adjustments at extended ranges — without paying a premium price.
User Feedback Summary
Shooters on international forums including Rimfire Central and Airgun Nation have shared their experiences with this scope. Key takeaways:
- Glass clarity and image quality — Consistently praised relative to price; several users noted it holds its own against more expensive brands.
- Turret tracking — Described as reliable and accurate, an important factor for long-range precision use.
- Reticle line thickness — A few users noted the reticle lines can appear thin at high magnification and may be harder to see without illumination in certain lighting conditions.
- Overall verdict — Multiple forum threads concluded that Discovery products are well suited for the vast majority of shooters, with one of the best value-for-money ratios in the category.
