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Black full-size roof-prism binoculars with 42mm objective lenses and twist-up eyecups

PENTAX

PENTAX 62761 SD 8x42 WP Binoculars

SKU CH-N4JX-389YS

Waterproof roof-prism binoculars with 8x magnification, 42 mm objectives, 131 m field of view at 1000 m and multi-stop twist-up eyecups

  • Part type or number62761
  • Field of viewat 1000m-131 m
  • Objective lens42 mm
  • Overall magnification8x
  • Product typeAccessory
  • DetailsType:Full-size Roof
  • Wide 131 m field of view at 1000 m for expansive situational awareness
  • Bright low-light images from 42 mm fully multi-coated objective lenses
  • True colour, high-contrast views via phase-corrected BaK-4 roof prisms
  • Comfortable extended viewing with multi-stop twist-up eyecups
  • Rugged waterproof build handles harsh weather and outdoor conditions

Full-size roof prism binoculars

The Pentax SD 8x42 WP is a full-size roof prism binocular built for outdoor observation. It suits birdwatchers, wildlife trackers and sports spectators who need a durable, waterproof optic for extended use in varied conditions. The 8x magnification brings distant subjects into sharp focus while maintaining a wide field of view. Buyers seeking compact pocket models or higher-power astronomy optics should look elsewhere.

Optical performance in normal use

Fully multi-coated 42 mm objective lenses maximise light transmission for bright, vivid images even in low light. Phase-corrected BaK-4 roof prisms reduce chromatic aberration, delivering high-contrast views with true colour rendition. The 60-degree apparent angle of view supports situational awareness during fast-moving action. No figures for eye relief, close focus distance or interpupillary adjustment range are provided.

8x magnification with 131 m field of view

The single specification that decides fit is the 8x magnification paired with a 131 m field of view at 1000 m. This combination balances detail and breadth for general-purpose nature and event viewing. Users who need greater reach for distant subjects or a wider panorama for dense habitats will require a different magnification or field-of-view specification.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $199.99
Pricier than about 66% of the 1,401 comparable items (median $93.99).

Specifications

Product
Brand namePENTAX
Model nameSD 8 × 42 WP
Part type or number62761
Product typeAccessory
Audio & video
Field of viewat 1000m-131 m
More details
Objective lens42 mm
Overall magnification8x

Questions about this item

How do I set the multi-stop twist-up eyecups for my eyes, and what step do people often miss?

Extend the eyecups by twisting them out until they click into the stop that matches your eye relief, then fine-tune the interpupillary distance so both barrels merge into one circle.

What maintenance will the fully multi-coated 42 mm objective lenses and BaK-4 roof prisms need over time?

Blow off dust with a blower, then wipe gently with a microfibre cloth and lens fluid; the waterproof seals require no lubrication but should be rinsed with fresh water after salt exposure.

At what point does the 131 m field of view at 1000 m become the limiting factor during extended scanning?

The 60-degree apparent angle stays constant, so the 131 m linear field at 1000 m is the first limit you notice when panning across wide terrain, not eye fatigue or vignetting.

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