Celestron Ultima 100 4"/100mm Waterproof Spotting Scope (Straight Viewing) Kit

Model: 52257

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Celestron 52257 1
Celestron 52257 1
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Packaging Info

Package Weight 7.55 lb
Box Dimensions (LxWxH) 23.0 x 7.4 x 7.3"

General Information

Angle of View 22x: 1.8°66x: 1.0°
Field-of-View (@ 1000 Yds) 22x: 95' (32 m at 1000 m)66x: 53' (18 m at 1000 m)
Minimum Focus Distance 33.0' (10.0 m) at 22x (unspecified otherwise)
Exit Pupil Diameter 22x: 4.5mm66x: 1.5mm
Eye Relief 18mm at 22x (unspecified otherwise)
Magnification 22-66x
Twilight Factor 22x: 46.966x: 81.2
Weatherproofing Waterproof
Dimensions 19.0" (483mm) in Length
Weight 4.5 lbs (2kg)
Relative Brightness 22x: 20.766x: 2.3
Objective Lens Diameter 100mm
Expert Reviews
2 April 2011

A valued yet well crafted spotting scope. It has enough zoom power and has very good light gathering ability even in a low light condition. At maximum zoom (at 67X), the view in the scope is still bright enough to see an object in detail with a minimal lose of focus.

  • +

    Adequate Power, Clear, Easy To Adjust, Easy To Install, Rugged, Well made

  • -

    Limited Adjustability

User Reviews
29 September 2015

First I get the Ultima 80 to watch the mountains from my balcony in Santiago,Chile and I start to watch the moon and some planets (Jupiter and Saturn looks small but very sharp and clear) and I liked so much that I want to improve it so I sell it and get Ultima 100.

31 December 2016

I wanted a spotting scope for birding, nature watching and large planetary astronomy. The moon and larger planets are awesome. I am very happy with my purchase. Spend the money on a beefy, stable tripod however. This is not a toy. It is a well-made spotting scope that is on the heavy side.

15 November 2016

Almost is just not good when using the eye peace that comes with this scope. When Zoomed out more then half it's power there is just a big fuzzy image. When not zoomed its ok.

7 September 2016

Shoot at 300 yards. see my 6.5 holes easy on white or red targets.

5 September 2016

Have had several cheaper, less powerful spotting scopes and have always been disappointed. This thing is incredible! Haven't given it a real workout yet but looking toward the nearest neighbor, about 1/4 mile away, on the 66X power setting I cannot just see the walnuts on their trees but can also...

Product Highlights
  • 39-66 Degree Apparent Field of View
  • Includes 22-66x Wide Angle Zoom Eyepiece
  • View-Through Case
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