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Black full-size Porro prism binoculars with large objective lenses and centre focus wheel

PENTAX

PENTAX 65873 SP 12x50 Waterproof Porro Prism Binoculars

SKU CH-MPV7-0SQY2

Waterproof 12x50 Porro prism binoculars with multi-layer coatings for bright, contrast-rich viewing in low light

  • 12x magnification brings distant subjects into clear view
  • 50 mm objective lenses gather ample light for bright images
  • Waterproof construction protects optics in wet conditions
  • Porro prism design delivers depth perception and wide field
  • Multi-layer coatings maximise light transmission for crisp detail

Pentax 65873 SP 12x50 Binoculars

The Pentax 65873 SP 12x50 binoculars are full-sized Porro prism optics built for outdoor observation. Their waterproof construction and centre-focus system suit birdwatchers, stargazers and general nature viewers who need reliable performance in changing weather. The large 50 mm objective lenses gather ample light for dawn or dusk use.

Optical limits of 12x magnification

Twelve-power magnification narrows the field of view and amplifies hand tremor, so steady holding or a tripod adapter becomes important for extended sessions. The 50 mm aperture helps offset dimness at this magnification, yet exit pupil size remains fixed by the 12x50 design. Low-light brightness depends on the multi-layer coatings transmitting available light efficiently.

Porro prism design decides fit

The Porro prism layout creates a wider, heavier body than roof-prism equivalents, which affects packability and handling during long hikes. Buyers who need a compact, lightweight glass for fast movement should note this form factor. The rigid chassis maintains optical alignment but does not reduce the overall footprint.

Highlights

  • 12x magnification brings distant subjects into clear view
  • 50 mm objective lenses gather ample light for bright images
  • Waterproof construction protects optics in wet conditions
  • Porro prism design delivers depth perception and wide field
  • Multi-layer coatings maximise light transmission for crisp detail

Specifications

BrandPENTAX

Questions about this item

Should I choose the 12x50 version or a smaller magnification for handheld use?

The 12x magnification brings distant subjects closer but amplifies hand shake; a 50 mm objective gathers ample light for dawn or dusk viewing.

How bright will the image be at 12x magnification in low light?

The 50 mm objective lenses and multi-layer coatings maximise light transmission, delivering contrast-rich, bright images even in poor lighting.

Are the binoculars fully waterproof for heavy rain or immersion?

The WP designation confirms waterproof construction, so the optics stay protected in wet weather and humid conditions.

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