With an eye for the discerning nature enthusiast, the Pentax 10x50 Z-Series ZD ED Binoculars feature multiple optical technologies to improve the image quality and ensure accurate colors in all weather and lighting conditions - especially in low light, such as dawn and dusk when many birds and game are most active.

The image-enhancement starts with the 50mm objective lenses that draw in copious amounts of light and extend the practical useable ability well beyond smaller objective optics. The lenses are made with hybrid aspherical elements and extra-low dispersion (ED) glass. The aspherical elements eliminate distortion around the edges of the lens for clear edge-to-edge views and corrects lens astigmatism that can prevent the ability to bring subjects into sharp focus. ED glass corrects for chromatic aberration to ensure colors are accurately rendered. Antireflective, fully multicoated optics maximize light transmission through the entire optical path to make views appear bright and crisp, especially in low light. Finally, the BAK4 roof prisms are phase-corrected to enhance contrast and further correct chromatic aberration. These technologies work together to produce bright and clear high-contrast images with virtually no distortion and accurate colors.

Complementing the optical performance is a housing that is built for a lifetime of rugged outdoor use. The chassis is made of a lightweight and durable magnesium alloy with a rubberized armor that protects against impacts while providing a slip-resistant grip. The optical tubes are nitrogen filled for fog-resistant performance and O-ring sealed to make the binoculars submersible to as much as 3.3'. A protective external lens coating helps repel dust, water, and oil to ensure obstruction-free viewing. The larger objectives add weight and bias the center of balance forward which could lead to user fatigue and possible hand-shake, so for steadier views during longer glassing sessions, the binoculars are tripod mountable with an optional adapter.

Extra-Low Dispersion Glass    Phase-Corrected BAK4 Roof Prisms    Hybrid Aspherical Lens Elements    Fully Multicoated Optics    Angle of View: 50°    Nitrogen-Filled, Fog and Waterproof    Closed Bridge Configuration    Magnesium Alloy Chassis    Tripod Mountable    Twist-up Eyecups

• 10x magnification
• 50mm objective lenses
• BAK4 Roof prism optical path
• Antireflective, fully multicoated optics
• Extra-low dispersion (ED) glass reduces chromatic aberration for sharper images with accurate color
• Phase corrected prisms produce high-contrast images with true color rendition
• Hybrid aspherical lens elements correct for spherical aberrations to reduce distortion at the edges of the lens and corrects for astigmatism that can prevent sharp focusing
• 262' field of view at 1000 yards
• 50° angle of view

• Closed bridge configuration
• Large knurled center focus wheel
• Right-eye diopter adjustment
• 22mm long eye relief, 5.0mm exit pupil
• Twist-up eyecups for use with or without eye wear
• Tripod mountable with optional adapter

• Lightweight and durable magnesium alloy housing
• Rubberized armoring protects against impacts and provides slip-resistant grip
• Nitrogen-filled, fog resistant, and submersible to 3.3'
• Internal focusing system helps to maintain waterproof seals
• Coatings are dust, water, and grease repellent to keep the optical surfaces clean

Related Questions and Answers

Q: 1. Does Pentax manufacture these in Japan?

A: Yes this series is made in Japan.

Q: 2. Can you post the weight? It's interesting that the weight of the binoculars is not referenced in the specs.

A: General Dimensions 6.7 x 5.2 x 2.3" / 17 x 13.2 x 5.8 cm Weight 29.6 oz / 839.2 g

Q: 3. Is there a tripod mount?

A: Yes, you can unscrew de round cap with te logo that in in the front of the focusing knob. There is a thread for attach a tripod mount.

Q: 4. Are these binoculars okay for eyeglass wearers?

A: Yes they are. These binoculars have fold-down rubber eyecups for easy use with or without eye wear.

Q: 5. For moon and stargazing, what reasonable tripod would you recommend to use with the Pentax 10x50 SP WP ?

A: To mount the Pentax 10x50 S-Series SP WP Binoculars on a tripod one needs an adapter like the Pentax TP-3 Tripod Adapter (f/ Binoculars w/ a 1/4"-20 Threaded Tripod Socket), BH #PETAPCFQ (https://bhpho.to/3avpVxS). For a tripod one can use the Vanguard VEO 2 PRO 233AO Aluminum Tripod with PH-28 Tripod Head, BH #VAVEO2P233AO (https://bhpho.to/3PBhmkb).

Q: 6. What is the IPD for these ?

A: By opening and closing the central pivot, you can adjust the distance between the eyecups (IPD) from a minimum setting of 5.8cm, right up to a maximum of 7.4cm. For a full sized bin, this is a pretty good range and means that they should be able to accommodate most people.

Q: 7. Are these binoculars waterproof?

A: Unfortunately this model is not Waterproof. It's Slip Resistant, also could handle light right. They are not Waterproof though. If you wanted something Waterproof I would go with the Nikon 16x50 Action Extreme ATB Binoculars. Website link: http://bhpho.to/1BfHF7L

Q: 8. What type of prism used here- BK7 or BAK-4

A: Looks like BK7 to me.

Q: 9. Fog proof ?

A: The Pentax 12x50 S-Series SP Binoculars BH #PE12X50SP • MFR #65904 are not fog or waterproof.

Q: 10. What is the difference between the SP and SP WP version of the same binoculars ?

A: The SP Version has a wider angle of view with the same Magnification as the SP WP. Plus the SP has a Eye Relief of 13mm, and the SP WP has a much more comfortable Eye relief of 20mm.