Celestron 21044 76mm PowerSeeker Telescope

Celestron 21044 76mm PowerSeeker Telescope
Celestron 21044 76mm PowerSeeker Telescope Celestron 21044 76mm PowerSeeker Telescope (click images to enlarge)

Celestron 21044 76mm PowerSeeker Telescope

$69.95
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Product prices and availability are accurate as of 2017-11-17 07:27:26 EST and are subject to change. Any price and availability information displayed on http://www.amazon.com/ at the time of purchase will apply to the purchase of this product.

Manufacturer Description

The Celestron PowerSeeker series of telescopes is designed to give the first-time buyer the perfect combination of quality, value, features and power. Offering exceptional value, these telescopes feature portable yet powerful designs with ample optical performance to excite any newcomer to the world of amateur astronomy. Product Details Affordable telescope for beginning astronomer; portable yet powerful All-glass optical components with high transmission coatings for enhanced image brighness and clarity Newtonian optical design with a 76mm aperture and 700mm focal length Altazimuth mount suitable for terrestial viewing as well as astronomical use Technical Specifications Optical Tube Info Aperture (mm) - 76 mm (2.99 in) Focal Length - 700 mm (28 in) Focal Ratio - 9.21 Focal Length of Eyepiece 1 (mm) - 20 mm (0.79 in) Magnification of Eyepiece 1 - 35 x Focal Length of Eyepiece 2 (mm) - 4 mm (0.16 in) Magnification of Eyepiece 2 - 175 x Barlow Lens - 3 x Finderscope - 5x24 Mount Info Mount Type - Altazimuth Accessory Tray - No-Tool Tray with Eyepiece holder Tripod - Aluminum Highest Useful Magnification - 180 x Lowest Useful Magnification - 11 x Limiting Stellar Magnitude - 11.9 Resolution (Rayleigh) - 1.83 arc seconds Resolution (Dawes) - 1.53 arc seconds Light Gathering Power (Compared to human eye) - 118 x Apparent Field of View - 1.2 degrees Linear Field of View (@1000 yds) - 62 ft (19 m) Secondary Mirror Obstruction - 0.75 in (19 mm) Secondary Mirror Obstruction by Dia...

Celestron's value priced PowerSeeker 76 telescope uses a Newtonian optical system to gather up to 60 percent more starlight than popular 60mm starter scopes. The package includes an adjustable Alt-Azimuth tripod, a Kellner type K20 eyepiece, a Ramsden type SR4 eyepiece, a 3x barlow lens, and a 5x24 cross-hair finder scope.

Using mirrors instead of lenses, the Powerseeker's Newtonian reflector design produces images that are noticeably sharper and brighter than 60mm refractors. With the SR4 eyepiece (175x), I can make out all four stars of the famous double-double star E-Lyrae, but a 60mm refractor only shows me two tiny figure-eights. When I look a the Double Cluster in Perseus with the K20 eyepiece on a moonless night, the image is bright enough to show me dozens of individual stars. The reflector design shows pure colors, without the false color or blue fringing I see in low cost refractors. Looking at the double star Gamma Andromeda, for instance, the primary star shines yellow-gold while the secondary is pale blue.

The Powerseeker 76 arrived neatly packaged in a compact box. When I assembled the telescope, though, I got the impression it needed another washer here and there: the tripod legs seemed a little too wide to fit the tripod head, the slow motion control rod seemed a little too tight. The assembled telescope turns out to be quite stable; I like to use it with the legs kept short. Since the eyepiece is near the top of the tube, the eyepiece height is very comfortable for a seated adult. Even at 175x magnification with the SR4 eyepiece, the view is steady enough that I have no trouble focusing.

There's no doubt this is a bargain priced telescope with good optical performance. I'd like it even better if it came with a K10 eyepiece instead of the 3x barlow, and it would be nice to have a better finder scope and a more rugged mount. Orion's Spaceprobe 3 Altaz is a similar telescope with more accessories included. –Jeff Phillips

Pros:

  • Low cost
  • Good optics
Cons:
  • Small aperture
  • Some parts don't fit well
  • Plastic barlow and finder


Product Features

Affordable telescope for beginning astronomer; portable yet powerful All-glass optical components with high transmission coatings for enhanced image brighness and clarity Newtonian optical design with a 76mm aperture and 700mm focal length Altazimuth mount suitable for terrestial viewing as well as astronomical use Includes 3x Barlow Lens (1.25"), 20mm eyepiece, 4mm eyepiece, aluminum tripod with accessory tray

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