Discoveryopt® LHT 4.5–18×42 SFIR FFP MOA Riflescope

The Discoveryopt LHT 4.5–18×42 SFIR FFP MOA combines a 4.5–18× magnification range, 42 mm objective lens, and a first focal plane reticle. Its MOA-based locking turrets provide a 0.25 MOA click value, while side parallax adjustment is available from 10 yd / approximately 9.1 m to infinity. The riflescope also features red reticle illumination with 6 brightness settings and a lightweight 30 mm main tube construction weighing 515 g.

First Focal Plane Reticle

The reticle is located in the first focal plane, meaning it scales with the target image as magnification changes. Its angular subtensions therefore remain accurate throughout the entire 4.5–18× magnification range. The field of view ranges from approximately 8.6 m at 4.5× to 2.1 m at 18×, measured at 100 m.

0.25 MOA Adjustments and Locking Turrets

Each elevation and windage click equals 0.25 MOA, corresponding to approximately 7.3 mm at 100 m. The riflescope provides 86 MOA of total elevation travel and 60 MOA of total windage travel. Both turrets can be locked after adjustment to reduce the risk of unintended rotation during handling, field use, or transport.

Side Parallax Adjustment and Reticle Illumination

The side-focus control provides parallax adjustment from 10 yd / approximately 9.1 m to infinity. It allows the target image to be focused for the selected distance while minimizing apparent reticle movement caused by parallax. The reticle features red illumination with 6 brightness settings, allowing its intensity to be adapted to the ambient light. The illumination system is powered by one CR2032 battery.

Lightweight 30 mm Main Tube Construction

The riflescope features a 30 mm main tube, measures 335 mm in overall length, and weighs 515 g. The exit pupil ranges from 9 to 2.2 mm, while eye relief measures approximately 89 to 85 mm. Nitrogen purging helps prevent internal fogging, while the IP67 rating provides dust-tight protection and resistance to temporary immersion in water. The manufacturer rates this model for recoil up to .300 Win. Mag.

Included Accessories

The package includes the riflescope, sunshade, lens covers, cleaning cloth, user manual, 2 specification cards, warranty card, quality control card, and additional small accessories. Scope rings are not included and must be selected separately for the 30 mm main tube.

Key Benefits:

• 4.5–18× magnification range
• 42 mm objective lens
• first focal plane reticle
• MOA-based adjustments
• 0.25 MOA click value
• 86 MOA of total elevation travel
• 60 MOA of total windage travel
• locking elevation and windage turrets
• side parallax adjustment from 10 yd / approximately 9.1 m to infinity
• red reticle illumination
• 6 illumination brightness settings
• field of view of approximately 8.6–2.1 m at 100 m
• 9–2.2 mm exit pupil
• approximately 89–85 mm eye relief
• 30 mm main tube
• 335 mm overall length
• 515 g weight
• nitrogen-purged construction
• IP67-rated protection
• rated by the manufacturer for recoil up to .300 Win. Mag.
• powered by one CR2032 battery
• sunshade and lens covers included
• scope rings not included