Pentax Jupiter 12x50 Porro Prism Binoculars - Multi-Coated, Black

On a crisp autumn morning, a birdwatcher raises the Pentax Jupiter 12x50 to scan a distant treeline, instantly resolving the fine plumage of a perched hawk. These full-size Porro prism binoculars pair 12x magnification with large 50 mm objective lenses, gathering abundant light for bright, detailed views from dawn until dusk. The multi-coated optics enhance contrast and colour fidelity, while the rugged black body provides a secure grip for extended observation sessions.

Key specifications

• Magnification: 12x
• Objective lens diameter: 50 mm
• Prism type: Porro prism
• Optical coating: Multi-coated (MC)
• Exit pupil: 4.17 mm
• Field of view at 1000 m: 96 m
• Angular field of view: 5.5°
• Focus system: Center focus
• Diopter adjustment: Yes
• Relative brightness: 17.4
• Twilight factor: 24.5
• Product colour: Black

Why choose it

The Jupiter 12x50 delivers exceptional reach and light-gathering power in a classic Porro design. The multi-coated lenses minimise internal reflections and maximise transmission, producing sharp, high-contrast images even in challenging light. The centre focus wheel and right-eye diopter allow fast, precise focusing, while the 4.17 mm exit pupil ensures comfortable viewing for most users. Whether tracking wildlife or exploring the night sky, this binocular offers a compelling balance of performance and value.

Ideal use cases

• Birdwatching and nature observation
• Stargazing and astronomy
• Outdoor sports and events
• General long-distance viewing

Good to know

Weighing 1.18 kg, the Jupiter 12x50 is best used with a tripod for extended sessions, as 12x magnification can amplify hand shake. The Porro prism design provides a wide stereo effect and excellent depth perception. The binocular is finished in a durable black housing that withstands regular outdoor use.