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Celestron 52252 Ultima 100 - 45° Spotting Scope

Item Number: 3152175

Price: $399.95

This item is available for giftwrap!

  • 100 mm Refractor Spotting Scope
  • Largest Aperture Available
  • 45° viewing angle
  • 22-66x zoom eyepiece

The Largest Aperture Scope in the Ultima Line

The 100 mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performance in low light conditions. The 100 mm refractor features excellent multi-coated optics packed into a portable and durable refractor design and comes standard with a 22-66x zoom eyepiece. You’ll love it for observing nature and long distance spotting and since it is completely waterproof you can feel comfortable using it in extreme weather. The green rubber optical tube allows for subtle observation in any nature environment. Ultima spotters are a great companion for any nature or outdoor enthusiast. Soft carrying case included.


  • 100 mm Refractor Spotting Scope
  • Multi-Coated optics
  • 45° viewing angle
  • 22-66x zoom eyepiece
  • Sight tube for quick targeting
  • Waterproof
  • Soft carrying case
  • Limited Lifetime Warranty


Optical Design Refractor
Aperture (mm) 100 mm (3.94 in)
Focal Length (mm) 540 mm (21 in)
Focal Ratio 5.4
Angle 45 °
Eyepiece 1 8-24 Zoom
Magnification 1 22-66x
Finderscope Sighting tube
Other Equipment Tripod Balancing Platform
Carrying Case Soft Case
Highest Useful Magnification 236 x
Lowest Useful Magnification 14 x
Limiting Stellar Magnitude 12.5
Resolution (Rayleigh) 1.39 arc seconds
Resolution (Dawes) 1.16 arc seconds
Light Gathering Power (Compared to human eye) 204 x
Angular Field of View 1.8° - 1°
Linear Field of View (@1000 yds) 95ft @ 22x 53ft @ 66x
Eye Relief 18 mm @ 22x
Near Focus 33ft @ 23x
Optical Coatings Multi-Coated
Optical Tube Length 19 in (483 mm)
Weight (oz) 72 oz (2041 g)
Camera Adaptable Built-in T-thread on Eyepiece
Tripod Adaptable Yes

SKU 3152175