Celestron 7″ Maksutov Cassegrain OTA

Description

Celestron 7″ Maksutov-Cassegrain OTA (#91012)

High Contrast. High Resolution. High Satisfaction.

Theres something undeniably special about the Celestron 7″ Maksutov-Cassegrain. Its not just the long focal length or the razor-sharp opticsits the whole observing experience. Whether youre splitting double stars, chasing planetary detail, or scanning the Moons rugged landscape crater by crater, this instrument delivers contrast and clarity that other scopes struggle to match.

This is a telescope built for observers who crave detail and definition over ultra-wide fieldsurban astronomers, planetary imagers, and lunar enthusiasts, were talking to you.

A Rare Opportunity to Own the OTA Alone

Celestron does not offer the 7″ Mak as a standalone OTA. Its only sold as part of a complete mount package. But on rare occasionslike this onewe receive the mount/OTA combo and make the OTA available separately. If you’ve ever dreamed of owning this optical powerhouse without paying for an entire setup you dont need, nows your chance.

Maksutov-Cassegrain: Contrast is King

At the heart of this telescope is a 180mm aperture with a 2700mm focal length, giving it an f/15 focal ratio. The optical design is classic Maksutov-Cassegrain: a catadioptric system using a meniscus corrector plate, spherical primary mirror, and a secondary spot thats applied directly to the back of the corrector.

What makes this so special?

• Infrequent Collimation: With no adjustable secondary mirror, the Mak holds collimation extremely wellideal for those who prefer observing over tweaking.

• High Contrast Performance: The smaller secondary obstruction (just 23.3% by diameter) results in higher contrast than comparably sized Schmidt-Cassegrainscritical when observing planetary features or subtle lunar shading.

• No Chromatic Aberration: As a reflective/refractive system, the Mak delivers sharp, color-pure views across the spectrum.

The only tradeoff is cooldown time. That thick corrector plate takes a while to reach thermal equilibrium, especially in colder climates. But once it doesthe views speak for themselves.

Excellent for Visual and Narrow-Field Imaging

This scope excels in applications that benefit from long focal lengths and tight fields of view:

• Planets: Youll see Saturns Cassini Division, Jupiters festoons, and Mars polar caps with stunning definition.

• Double Stars: With 0.64″ Rayleigh and 0.52″ Dawes resolution, its a double star hunters dream.

• The Moon: Craters, rilles, and mountain ranges appear with photographic sharpnessno exaggeration.

Included Accessories

This OTA comes ready to observe with:

• 2″ Visual Back

• 2″ Star Diagonal with 1.25″ Adapter

• 28mm 2″ Wide-Field Eyepiece (96x magnification)

• 8×50 Straight-Through Finderscope

• CGE-style Dovetail Rail for mounting on compatible equatorial systems

The entire tube assembly is constructed from aluminum and weighs in at 19 lbs, making it highly manageable and mount-friendly.

Final Thoughts

The Celestron 7″ Maksutov-Cassegrain OTA is a specialized instrument that fills a unique nicheone that prioritizes high-resolution, high-contrast, pinpoint views over wide-field sweeping. Its built for those who appreciate optical precision and planetary finesse, whether from light-polluted backyards or dark-sky retreats.

If youve been waiting for an opportunity to own one of the finest mid-sized Maks ever made, dont let this one pass by.

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