Pentax 12×50 S-Series SP Binoculars

​The Pentax 12×50 S-Series SP Binoculars are engineered for both astronomical and terrestrial observations, offering high magnification and superior optical clarity. They feature 12× magnification paired with large 50 mm objective lenses, delivering bright, sharp images with a field of view of 294 feet at 1000 yards (approximately 98 meters at 1000 meters). The Porro prism design, equipped with BaK-4 glass and fully multicoated optics, enhances image depth and clarity.

With 20 mm eye relief and fold-down rubber eyecups, they provide comfortable viewing for users with or without glasses. Built to withstand various weather conditions, these binoculars are nitrogen-filled and O-ring sealed, making them waterproof up to 1 meter and fog proof. Additional features include a large, knurled center focus wheel for precise adjustments, a right-eye diopter for personalized focus, and the option to mount them on a tripod using an optional adapter for extended viewing sessions.

Key Specifications:

Optical System:

• Magnification: 12×

• Objective Lens Diameter: 50 mm

• Prism Type: Porro prism

• Prism Glass: BaK-4

• Lens Coating: Fully multi-coated

• Field of View (at 1000 m): 98 m

• Actual Field of View: 5.7°

• Apparent Field of View: 57.5°

• Exit Pupil Diameter: 4.2 mm

• Eye Relief: 20 mm

• Relative Brightness: 17.6

Focusing & Close Range:

• Focusing Mechanism: Center focus wheel

• Diopter Adjustment: Right eyepiece

• Minimum Focusing Distance: 8 m

Build & Durability:

• Waterproofing: Yes, JIS Class 6 (up to 1 meter for 5 minutes)

• Fogproofing: Nitrogen-filled

• Body Armor: Rubber-coated for enhanced grip and shock resistance

Eyecups & Viewing Comfort:

• Eyecup Type: Fold-down rubber eyecups

• Eyeglass Compatible: Yes (long eye relief)

Mounting:

• Tripod Adaptable: Yes (requires optional tripod adapter)

Physical Specifications:

• Dimensions: Approx. 164 mm (W) × 133 mm (H) × 58 mm (D)

• Weight: Approx. 1040 g

• Included Accessories:

  • Neck strap

  • Lens caps

  • Carrying case

  • Cleaning cloth