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Celestron - 71017 - SkyMaster 25x100 Observation Binoculars

Code: R42RE

  • 25x magnification porro prism binocular
  • Giant 100 mm objective lens offers maximum image brightness in low-light and long-range conditions
  • Ultra sharp focus across the field of view
  • Individual Eyepiece Focus to ensure optimal focus position
  • Multi-Coated optics for sharp, clear views
  • Suitable for long-range terrestrial or astronomical viewing
  • Protective rubber covering for ultra-firm grip
  • Integrated tripod adapter rod for ultra-stable tripod mounting
  • Long eye relief ideal for eyeglass wearers
  • Deluxe padded carrying case included for travel and safe storage
  • Limited Lifetime Warranty provides best protection and product support on the market

Product details

Celestron - 71017 - SkyMaster 25x100 Observation Binoculars

• 25x magnification porro prism binocular
• Giant 100 mm objective lens offers maximum image brightness in low-light and long-range conditions
• Ultra sharp focus across the field of view
• Individual Eyepiece Focus to ensure optimal focus position
• Multi-Coated optics for sharp, clear views
• Suitable for long-range terrestrial or astronomical viewing
• Protective rubber covering for ultra-firm grip
• Integrated tripod adapter rod for ultra-stable tripod mounting
• Long eye relief ideal for eyeglass wearers
• Deluxe padded carrying case included for travel and safe storage
• Limited Lifetime Warranty provides best protection and product support on the market


Celestron's SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BaK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

For maximum stability and secure optical alignment the 100 mm SkyMaster model features enhanced structural reinforcement to the main binocular body. As an additional convenience, the 100 mm SkyMaster model also includes an integral super rigid photo tripod adapter. The SkyMaster Series binoculars are built to provide years of magnificent views of the world around you and the heavens above.

Specification table
Objective Lens Diameter (mm) 100 mm
Magnification (x) 25x
Apparent Field of View
Exit Pupil (mm) 4 mm
Eye Relief (mm) 15 mm
Close Focus 80 ft
IPD Max 72 mm
IPD Min 56 mm
Optical Coatings Multi-Coated
Weight (oz) 140 oz (3969 g)
Prism Glass (Type) BaK-4
Twilight Factor 50
Relative Brightness 16
Weatherproof Water Resistant
Tripod Adaptable Yes

Bulk Prices

Item code Item name Quantity Price
R42RE Celestron - 71017 - SkyMaster 25x100 Observation Binoculars (1+) £310.99

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£310.99

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