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Celestron Astromaster 90 AZ Telescope

Discover our Solar System with the Celestron AstroMaster 90AZ! You’ll be ready to observe in minutes thanks to the quick and easy no-tool setup. The 90AZ provides bright, clear images of the Moon, planets, star clusters, and more for great nighttime viewing.

Manual Alt-Azimuth telescope

Navigate the sky with a pan handle Alt-Az control with clutch for smooth and accurate pointing. Move the clutch in an up/down, left/right fashion to track your object in the eyepiece.

Accessories Included

Accessories include a 20mm and 10mm eyepiece, an erect image diagonal, and a Starpointer finderscope. The two eyepieces offer different magnifications for low and high powered views.

Starry Night Software

Download Celestron’s Starry Night Software and learn about the night sky, celestial objects, and how to plan your next observing session. Celestron Starry Night Software is the premier astronomy software package on the market, providing resources and knowledge to view our solar system and beyond.

Optical Tube Info:
Optical Design:	Refractor
Aperture:	90mm (3.54")
Focal Length:	1000mm (39")
Focal Ratio:	f/11
Focal Length of Eyepiece 1:	20mm (.8")
Magnification of Eyepiece 1:	50x
Focal Length of Eyepiece 2:	10mm (.4")
Magnification of Eyepiece 2:	100x
Barlow Lens:	Not Included
Finderscope:	StarPointer™ red dot finderscope
Star Diagonal:	Erect Image Diagonal - 1.25"
Optical Tube:	Aluminum
Highest Useful Magnification:	213x
Lowest Useful Magnification:	13x
Limiting Stellar Magnitude:	12.3
Resolution (Rayleigh):	1.55 arc seconds
Resolution (Dawes):	1.29 arc seconds
Light Gathering Power (Compared to human eye):	165x
Optical Coatings:	Fully Coated
Optical Tube Length:	770mm (30.3")
Optical Tube Diameter:	90mm (3.54")
Optical Tube Weight:	4.4 lbs (2 kg)
Dovetail:	CG-5 Dovetail bar
Mount Info:
Mount Type:	Manual Alt Azimuth
Height adjustment range (includes mount and tripod):	812.8mm - 1295.4mm (32" - 51")
Tripod Leg Diameter:	31.75mm (1.25") steel
Accessory Tray:	Yes
Tripod Weight:	7.9 lbs (3.6 kg) includes weight of mount
Slew Speeds:	Manual
Dovetail Compatibility:	CG-5 saddle plate
Software:	Celestron Starry Night Basic Edition Software and SkyPortal App
Total Kit Weight:	12.3 lbs (5.58")
Included Items:	Optical tube Tripod and mount (preassembled) 20mm and 10mm eyepiece Red-dot finderscope Erect image 90° diagonal Manual
Solar Warning	Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result. Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it. Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.

Ultima Edge - 15mm Flat Field Eyepiece - 1.25

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