The largest aperture scope in the Ultima line, the 100mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performance in low light conditions. The 100mm refractor features excellent multi-coated optics packed into a portable and durable refractor design and comes standard with a 22-66x zoom eyepiece.

This series was designed to perform well in a range of viewing situations, making it a great all-around optical instrument. 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.

Specifications

Magnification: 22 – 66x

Objective Lens Diameter: 100mm (3.93″)

Eyepieces: 8mm – 24mm (.31″ – .94″)

Angular Field of View: 1.8° – 1.0°

Linear Field of View (@1000 yds) / @1000 m): 28.6m @ 22x| 15.8m @ 66x

Focal Length: 540mm (21.26″)

Exit Pupil: 4.5mm – 1.5mm (.17″ – .06″)

Eye Relief: 18mm (.71″)

Close Focus: 10 m

Twilight Factor: 82.1 – 47.4

Relative Brightness: 19.7 – 2.2

Limiting Stellar Magnitude: Ideal: 12.50

Moderate: 11.50

Poor: 10.50

Lens Coatings: Fully Multi-Coated

Prism Glass (Type): BaK-4

Prism Coatings: FMC

Weight: 72 oz (2041 g)

Environmental Protection: Waterproof

Nitrogen Filled: Yes

Tripod Adaptable: Yes

Carrying Case: Padded green woven nylon view-through

Camera Adaptable: Yes

Dimensions: 540mm x 110mm x 180mm (21.3″ x 4.3″ x 7.1″)

In The Box

Celestron Ultima 100 Spotting Scope

Extend plate

Zoom eye piece with integrated T-adapter

Carrying case

Eyepiece lens cap

Eyepiece Port cover

Eyepiece carrying case

Eyepiece pouch

Lens cloth

Instrument manual