The Hawke Sidewinder 30 SF 6.5–20×44 (Model 17150) is a high-magnification riflescope engineered for long-range precision rimfire, air rifle competition, and varmint hunting. Built around a 30 mm mono-tube chassis, it integrates Hawke's System H5 optical system featuring 18-layer fully multi-coated crown glass and a 24° ultra-wide field of view. It features an etched-glass 20× Half Mil reticle in the second focal plane, 6-level red illumination powered by a single CR2032 battery, and exposed push-pull locking turrets with a turn-indicator witness window.

Key Features

• System H5 Optics: High-grade, low-dispersion crown glass delivering edge-to-edge clarity and a wide field of view ranging from 5.6 m to 1.8 m at 100 m across the 6.5–20× zoom range.
• Close-Focus Parallax: Side focus adjustment operating from 9 metres (10 yards) to infinity, supplemented by an included 2.5-inch side wheel for fine rangefinding and focus control.
• Exposed Locking Turrets: Resettable 1/10 MRAD push-pull turrets with an integrated witness window to track full turret revolutions across a 20 MRAD total elevation and windage range.
• Etched 20× Half Mil Reticle: Second focal plane reticle calibrated at 20× magnification with 6 brightness levels of red illumination.
• Ruggedised Housing: All-calibre recoil-proof construction that is nitrogen-purged, waterproof, and fog-proof.
• Included Accessories: Supplied with a 4-inch metal sunshade, 2.5-inch side wheel, zoom throw lever, flip-up lens covers, and hex keys.

Specifications

• Magnification: 6.5–20×
• Objective Lens Diameter: 44 mm
• Tube Diameter: 30 mm mono-tube
• Reticle: 20× Half Mil (Etched Glass, SFP)
• Parallax Adjustment: Side focus, 9 m (10 yds) to infinity
• Eye Relief: 102 mm (4.0 in)
• Exit Pupil: 6.8–2.2 mm
• Click Value: 1/10 MRAD
• Total Adjustment Range: 20 MRAD (Elevation & Windage)
• Length: 339 mm (13.3 in)
• Weight: 680 g (24.0 oz)
• Power Source: 1× CR2032 coin cell

Who is the Hawke Sidewinder 30 SF 6.5-20x44 for?

• Precision rimfire target shooters — provides the high-magnification capability of a 6.5–20× zoom combined with a rigid 30 mm mono-tube to dial precise 1/10 MRAD elevation corrections on .22 LR and .17 HMR platforms.
• Field target air rifle competitors — utilizes a side-focus parallax system that dials down to a minimum of 9 metres (10 yards), allowing this long range rimfire riflescope to eliminate parallax error on close-range targets.
• Varmint and pest control hunters — delivers a 680 g platform featuring a 44 mm objective lens and 102 mm eye relief to identify small game at extended distances without adding excessive front-heavy bulk to the rifle.

Less suitable for: Ultra-long-range shooting beyond 600–800 metres on larger game, which requires larger 50 mm or 56 mm objective riflescopes to maintain a brighter exit pupil at 20× magnification; or fast, off-hand bush stalking in dense timber, where lighter 1-inch tube scopes with lower magnification ranges like 3–9×40 or 2.5–10×42 provide a wider field of view and faster target acquisition.