Celestron C90 Maksutov-Cassegrain Spotting Scope

Celestron C90 Maksutov-Cassegrain Spotting Scope

The Celestron C90 Mak Spotting Scope is a compact, powerful, and versatile optic designed for both terrestrial and astronomical observation. With its Maksutov-Cassegrain optical design, multi-coated optics, and high-contrast performance, it delivers razor-sharp images whether you’re birdwatching, viewing wildlife, or exploring the Moon and planets.

Key Features

• 90mm (3.54") Aperture Maksutov-Cassegrain Design – bright, sharp, high-contrast images

• Multi-Coated Optics – improved light transmission for crisp detail

• 39x Magnification with included 32mm Plössl eyepiece

• Erect Image System – perfect for terrestrial and celestial use

• Built-in T-Adapter Threads – easily attach SLR cameras for digiscoping or astrophotography

• Close Focus of 15 ft (4.6m) – excellent for detailed observation of nearby subjects

• Compact & Portable – lightweight, easy to transport in the included backpack

• Tripod Adaptable – two ¼-20 mounting points and an 80mm dovetail rail for stability

• Complete Kit – includes eyepiece, diagonal, finderscope, covers, and backpack case

• Celestron Limited Lifetime Warranty

Maksutov-Cassegrain Optical Excellence

The Maksutov-Cassegrain (Mak) design combines a lens and mirror system to produce images that are:

• Bright and sharp across the entire field

• Virtually free from chromatic aberration

• High contrast, thanks to the smaller secondary spot on the corrector plate

Unlike many telescopes, the C90 Mak requires minimal collimation, making it easy to maintain. Its only trade-off is a slightly longer cool-down time due to the larger corrector plate.

Multi-Purpose Performance

The C90 is built for flexibility, making it ideal for:

• Terrestrial Viewing – wildlife, birds, landscapes, and long-distance observation

• Astronomy – craters on the Moon, planets, and brighter deep-sky objects

• Photography – connect cameras via built-in T-adapter threads to capture stunning images

Portable and Travel-Friendly

Weighing just 74 oz (2.1 kg) and measuring only 400mm in length, the C90 Mak is compact enough for travel. It comes with a rugged nylon backpack that holds the scope and accessories securely, making it perfect for field trips, hikes, or stargazing outings.

Technical Specifications

• Magnification: 39x (with included 32mm Plössl)

• Objective Lens Diameter: 90mm (3.54")

• Focal Length: 1250mm (f/13.9)

• Field of View: 1.3° / 68 ft @ 1000 yds

• Close Focus: 15 ft (4.6m)

• Eye Relief: 20mm

• Exit Pupil: 2.3mm

• Optics: Multi-Coated, BaK4 prism

• Dimensions: 400mm x 260mm x 260mm (15.7" x 10.2" x 10.2")

• Weight: 74 oz (2.1 kg)

• Tripod Adaptable: Yes (dual ¼-20 mounts + dovetail rail)

• Camera Adaptable: Yes (via T-adapter threads)

• Carrying Case: Heavy-duty woven nylon backpack

Included Accessories

• 32mm Plössl eyepiece (39x)

• 45° erect image diagonal

• 8x21 erect image finderscope

• Objective lens cover & eyepiece cap

• Nylon backpack case

Safety Warning

⚠️ Never look directly at the Sun with the naked eye or through the C90 Mak without a proper solar filter. Permanent and irreversible eye damage may result.

Why Choose the Celestron C90 Mak?

The Celestron C90 Maksutov-Cassegrain Spotting Scope delivers an unbeatable combination of optical power, portability, and versatility. Whether you’re a nature enthusiast, traveller, or amateur astronomer, this iconic spotting scope provides sharp, detailed views in a compact, easy-to-use package.