Celestron AstroMaster 90EQ 90mm f/11 Refractor Telescope

BH #CEAM90EQ • MFR #21064
Celestron AstroMaster 90EQ 90mm f/11 Refractor Telescope
Key Features
  • 90mm Aperture Refractor OTA
  • 1000mm Focal Length, f/11 Focal Ratio
  • Fully Multi-Coated Optics
  • 1.25" Focuser, 10mm and 20mm Eyepieces
Designed as a capable and portable starter-scope, the Celestron AstroMaster 90EQ 90mm f/11 Refractor Telescope is a complete observational platform for making detailed observations of the Moon, viewing planets, or comet-hunting. Its manual equatorial mount, when properly polar aligned, can easily track objects using the slow-motion cables with reduced vibrations, and easy-to-read setting circles aid in speeding up celestial navigation to known coordinates. The entire rig assembles and breaks down without the need for tools, so users can set up fast and get observing sooner.
In Stock
$299.99
Protect Your Gear
Add a protection plan from $42.99

Celestron 90EQ Overview

  • 1Description
  • 2Optical Tube
  • 3Mount and Tripod
  • 4Included Accessories

Designed as a capable and portable starter-scope, the Celestron AstroMaster 90EQ 90mm f/11 Refractor Telescope is a complete observational platform for making detailed observations of the Moon, viewing planets, or comet-hunting. Its manual equatorial mount, when properly polar aligned, can easily track objects using the slow-motion cables with reduced vibrations, and easy-to-read setting circles aid in speeding up celestial navigation to known coordinates. The entire rig assembles and breaks down without the need for tools, so users can set up fast and get observing sooner.

This version of the AstroMaster comes with two eyepieces that yield a range of magnifications, and a 90° diagonal that sports an integrated erecting prism to correct images and allow the scope to be used as a conventional spotting scope for terrestrial use. The diagonal also places the user's head in a more comfortable position especially when the OTA is pointed at or near the zenith. An adjustable-height stainless steel tripod supports the mount and optical tube, and comes with a center tray that conveniently holds accessories while improving stability and reducing vibrations.

Optical Tube
  • 90mm aperture
  • f/11 focal ratio
  • 1000mm focal length
  • Refractor-style optical path
  • Fully multi-coated optics improve light transmission, color rendition, and contrast
  • Resolution: 1.55 arcsec (Rayleigh); 1.29 arcsec (Dawes)
  • 1.25" rack-and-pinion focuser
  • Dovetail mounting plate
Mount and Tripod
    Mount:
  • Manual equatorial
  • Locking altitude adjustment screw
  • Etched declination dial
  • Dual-axis slow motion cables enables precise adjustments with reduced vibrations
  • Two counterweights and counterweight bar allows proper balancing
  • Dovetail saddle accepts OTA mounting plate and allows for precise balancing
    Tripod:
  • 1.25" tubular stainless steel legs
  • Adjustable height to accommodate a variety of users and observing positions
  • Spiked feet to provide stability in rough or soft terrain
  • Center tray adds stability and vibration-reduction
Included Accessories
    Eyepieces:
  • 1.25" diameter barrel
  • Accepts most astronomical eyepiece filters
  • 10mm focal length produces 100x magnification
  • 20mm focal length yields 50x power
    Diagonal:
  • 90° angle places head in comfortable viewing position, especially when aimed at or near the zenith
  • Integrated erecting prism corrects image for terrestrial viewing as a conventional spotting scope
  • 1.25" snout and eyepiece holder fits and accepts the most common sized focusers and accessories
    Finder:
  • Permanently-mounted in-place
  • Unmagnified view ensures easy alignment and fast star-hopping navigation
  • Red illuminated center aiming dot is easy to see without obstructing small or dim objects
UPC: 050234210645

Celestron 90EQ Specs

Optical Design
Refractor
Aperture
90 mm
Focal Length
1000mm
Focal Ratio
f/11.1
Eyepiece Barrel Diameter
1.25"
Diagonal
90° erect-image
1.25" snout and eyepiece holder
Finderscope
StarPointer red-dot
Tripod
1.25" steel tube legs
Mount Type
Manual equatorial
GoTo System
None
Power Source
None
Optical Tube Dimensions
36.0" / 91.4 cm
Weight
Not specified by manufacturer
Packaging Info
Package Weight
33 lb
Box Dimensions (LxWxH)
43.2 x 15 x 10"

Celestron 90EQ Reviews

See any errors on this page? Let us know

is there a solar lens for this scope?

is there a solar lens for this scope?
Asked by: Kenneth
The Celestron AstroMaster 90EQ 90mm f/11 Refractor Telescope can be used with this Daystar solar filter: https://bit.ly/3UtM1FD
Answered by: Dan
Date published: 2024-02-08

question

What kind of T-ring added to phography for Sony E-mount camera at this Telescope?
Asked by: Anonymous
So if you don't already have the T-Adapter you would need the Celestron SLR (35mm OR Digital) Camera Adapter for All Refractor and Reflector Telescopes which Accept 1.25 Eyepieces - Requires Camera-Specific T-Mount Adapter. Link: http://bhpho.to/1lwAhIOFor the e-mount you would need the Vello T Mount Lens to Sony E-Mount Camera Adapter. Link: http://bhpho.to/1wzCdYn
Answered by: Alex S.
Date published: 2019-12-14

What is the outside diameter of the dew shield?

What is the outside diameter of the dew shield?
Asked by: Geff
The AstroMaster 90EQ lens shade outside diameter is not available. The bezel at the end of the lens shade is doubly tapered, so anything fitting on the outside, such as a solar filter may tend to slip off.
Answered by: Telescope
Date published: 2022-07-26

question

What is the best eye-piece for this telescope? How much mm?
Asked by: Patrick
The Astromaster 90EQ has a 1000mm focal length and comes with a 10mm and a 20mm eyepiece. The 10mm gives 100X (that is, 1000/10=100) and the 20mm gives 50x (1000/20=50x). The 50x is low power for looking at deep space objects like the Orion nebula and at the complete moon, and the 100x is high power for looking more closely at the moon and planets. So, the best eyepiece depends on what you are looking at. The 100x magnification produces only 0.9mm exit pupil -- that is, the beam coming out into your eye is only 0.9mm wide, and is about as high a magnification as you would want to use with this scope. A long tube telescope like this one will have some vibration, which will also be magnified.
Answered by: Mark C.
Date published: 2019-08-07
  • y_2024, m_2, d_20, h_8CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.38
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_4
  • loc_en_US, sid_485273, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo