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Thursday, April 14, 2011

Celestron 21061 AstroMaster 70 AZ Refractor Telescope

Celestron 21061 AstroMaster 70 AZ Refractor Telescope
General Features:
  • Quick and easy no-tool setup
  • Permanently mounted StarPointer

  • Erect image optics - Ideal for terrestrial and astronomical use

  • Quick release dovetail attachment - no tool setup

  • Pan handle Alt-Az control with clutch - for smooth and accurate pointing

  • Rugged pre-assembled tripod with 1.25-inches steel tube legs - Provides a rigid and stable platform
  • All coated glass optics for clear, crisp images
  • Deluxe accessory tray for convenient storage of accessories

"The Sky" Level 1 planetarium software with 10,000 object database and enhanced images
The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

Here You can see video review:


Specs

  • Optical Design: Refractor
  • Aperture: 70 mm (2.76 in)
  • Focal Length: 900 mm (35.43 in)
  • Focal Ratio: 12.86
  • Eyepiece 1: 20 mm (0.79 in)
  • Magnification 1: 45 x
  • Eyepiece 2: 10 mm (0.39 in)
  • Magnification 2: 90 x
  • Mount: Altazimuth
  • Optical Coatings: Fully Coated
  • Weight: 18 lb (8.16 kg)
  • Finderscope: Built-on StarPointer
  • Tube Attachment: Dovetail Bar
  • Star Diagonal: Erect Image Diagonal - 1.25"
  • Tripod: 1.25" steel tube legs
  • CD ROM: The Sky L1
  • Highest Useful Magnification: 165 x
  • Limiting Stellar Magnitude: 11.7
  • Resolution (Rayleigh): 1.99 arcsec
  • Resolution (Dawes): 1.66 arcsec
  • Light Gathering Power: 100 x
  • Angular Field of View: 1.1 °
  • Linear Field of View (@1000 yds): 58 ft (17.68 m)
  • Optical Tube Length: 36 in (914.4 mm)
2-year Telescope Warranty

Review :
This item is sturdy and easy to set up but lacks a couple of minor conveniences that could inexpensively been added by the manufacturer to enhance the user's enjoyment. Without detracting from our feelings that there is inherent value in this item to introduce the beginner (especially kids) to astronomy, the changes would be: (1) although the tripod is nice and firm with a locking mechanism, the removable little tray that one snaps inside the legs to hold some of the extras is not easy to put into place or remove; (2) there is insufficient guidance on how to best utilize the infrared eye piece that is battery powered and it is easy to overlook that this eyepiece battery is in the on positon when folding up and storing it and a dead battery will ensue; (3) there is not a protective cap for the 10mm or 20mm lens inserted into the eyepiece if you do not always want to have to remove and store them when not in use; and (4) a carrying case (cloth or plastic) for storage for a few bucks more would have been a nice addition...we're still searching for something suitable. Again, overall it was worth <$100 price paid but I would have been willing to add an extra $10 or $15 for the improvements mentioned above.

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