The Sightron SIII ED Competition Series 45x45 Riflescope is an ultra-high fixed-magnification optic engineered specifically for stationary competitive target shooting. Built around a 30 mm one-piece aircraft-grade aluminum tube, it features a fixed 45x magnification paired with a 45 mm objective lens to resolve fine target details at long distances. Precise mechanical tracking is delivered via Sightron's patented ExacTrack system, offering finger-adjustable, capped target turrets calibrated to 1/10 MOA click increments with 40 MOA of total elevation and windage travel.

Key Features

• ED Optical System: Extra-Low Dispersion (ED) objective glass combined with Zact-7 Revcoat Plus fully multi-coated surfaces minimizes chromatic aberration and optimizes contrast on high-precision targets.
• Fine Crosshair Reticle: The non-illuminated, glass-etched Fine Cross Hair (FCH) second focal plane reticle maintains a minimal target-obscuration profile at 45x magnification.
• ExacTrack Turret System: Patented erector tube technology maintains continuous, zero-drift alignment across the full 40 MOA elevation and windage range.
• Close-Focus Parallax: Side-focus parallax knob adjusts continuously from 10 yards (9.14 m) to infinity, allowing use across both indoor/rimfire distances and long-range centerfire disciplines.
• Rugged Housing: Nitrogen-purged, O-ring sealed to an IPX7 waterproof standard, and shockproof against heavy centerfire recoil while weighing 581 g (20.5 oz).

Product Specifications

• Magnification: Fixed 45x
• Objective Lens Diameter: 45 mm
• Main Tube Diameter: 30 mm
• Reticle: Fine Cross Hair (FCH), non-illuminated, Second Focal Plane
• Click Value: 1/10 MOA (0.1 MOA per click)
• Turret Travel per Revolution: 5 MOA
• Total Elevation / Windage Adjustment: 40 MOA / 40 MOA
• Parallax Adjustment: Side Focus, 10 yards (9.14 m) to infinity
• Eye Relief: 3.6 inches (~91.4 mm)
• Field of View: 2.4 ft at 100 yards (~0.8 m at 100 m)
• Length: 14.9 to 15.0 inches (~378 to 381 mm)
• Weight: 20.5 oz (581 g)
• Mounting Requirement: Standard 30 mm scope rings

Who is the Sightron SIII ED Competition Series 45x45 Riflescope for?

• Rimfire and air rifle benchrest competitors — Requires a side parallax adjustment focusing down to 10 yards (9.14 m) alongside 1/10 MOA click adjustments, allowing this fixed-magnification benchrest riflescope to clearly resolve 25 m and 50 m target cards.
• F-Class and long-range stationary target shooters — Utilises a fixed 45x magnification and 40 MOA of internal elevation travel to engage stationary paper and steel targets at distances from 100 to beyond 1,000 yards.

Less suitable for: Dynamic disciplines (such as PRS) or field hunting requiring target tracking, due to an extremely narrow field of view of 2.4 ft at 100 yards; these applications require a variable-power optic with a wider field of view (such as a 3–15x or 5–25x scope). It is also poorly suited for low-light dawn/dusk conditions or heavy midday mirage due to its 1.0 mm exit pupil, which is better served by a lower-magnification optic with a larger objective lens (such as a 50–56 mm objective at 15–20x).