Celestron C90 Mak


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Celestron C90 Mak The Maksutov optical design is recognized for being a portable design that is easy to use and has a variety of applications, making it an excellent choice for both terrestrial and astronomical usage. This C90 Mak has excellent optics with razor sharp images over a wide field.


  • Multi Coated Optics

  • Maksutov-Cassegrain Optical Design

  • Compact and Portable Design

  • Erect Image System for Terrestrial and Astronomical Use

  • Built-in T-Adapter threads for Ease of Adapting SLR Cameras

  • Comes with 32 mm Eyepiece, 45° Erect Image Diagonal and 8x21 Erect Image Finderscope

  • Backpack Made of Nylon

  • Limited Lifetime Warranty


  • Magnification - 39x (with included eyepiece)

  • Objective Lens Diameter - 90mm (3.54")

  • Eyepieces - 32mm Plossl (1.26")

  • Angular Field of View - 1.3° with included eyepiece

  • Linear Field of View (@1000 yds) / @1000 m) - 68 ft (20.7 m) with included eyepiece

  • Focal Length - 1250mm (49")

  • Exit Pupil - 2.3mm (0.1") with included eyepiece

  • Eye Relief - 20mm (.78") with included eyepiece

  • Close Focus - 15 ft (4.6 m) with included eyepiece

  • Twilight Factor - 59.2 with included eyepiece

  • Relative Brightness - 5.3 with included eyepiece

  • Lens Coatings - Multi-Coated

  • Prism Glass (Type) - BaK4

  • Prism Coatings - N/A

  • Weight - 74 oz (2,100 g)

  • Environmental Protection - Water Resistant

  • Nitrogen Filled - No

  • Tripod Adaptable - Yes

  • Carrying Case - Black heavy woven nylon backpack

  • Camera Adaptable - Yes

  • Dimensions - 400mm x 260mm x260mm (15.7" x 10.2" x 10.2") with included eyepiece

  • Included Accessories - Plossl 32mm eyepiece | 45° diagonal | 8x21 finderscope | Objective Lens Cover | Eyepiece Lens cap | Backpack Case

NOTICE: Some products in this store can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Please check the product label for warning information. For more information go to P65Warnings.ca.gov. We cannot ship any products into California that are affected by Proposition 65.

SHIPPING CHANGES: Due to new sales tax rules in the state of Colorado, effective June 1, 2019, purchases made online through JAX Mercantile for customers in the state of Colorado will only be able to be shipped to addresses within JAX current tax jurisdictions in Fort Collins, Loveland, Lafayette, and Broomfield. Customers in the state of Colorado who do not have shipping addresses within these zip codes may still opt for in-store pickup at any JAX store location when making a purchase on the JAX website. Learn more on our shipping and returns page.

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