*2nd* Orion Observer 90mm Equatorial Refractor Telescope
Item #72988
$229.99 $183.99
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  • More Info

    Beginning skywatchers looking for a low maintenance telescope that can serve up vivid, sharp images of the Moon, planets, and brighter deep-space objects need look no further than the Orion Observer 90mm Equatorial Refractor. A great telescope for the whole family, the Observer 90 EQ's fully antireflection coated 90mm-diameter (3.5") front lens boasts strong magnifying power. With the included 25mm and 10mm Plossl eyepieces you will view distant worlds in high-contrast detail at 36x and 90x! Jupiter's cloud bands are easily discerned, as are all four of its major moons. Saturn's rings, sharp and dazzling. And the lunar surface teems with craters and mountains in rugged relief.

    While the Observer 90 EQ excels at lunar and planetary observing, it can also provide great views of many more-distant objects. At 36x the Orion Nebula exhibits the four Trapezium stars as perfect blue pinpoints surrounded by greenish gas. Pop in the 10mm eyepiece to boost the power to 90x and - wow! - The nebulosity spans nearly the entire eyepiece field of view! In the summer sky the Great Hercules Star Cluster (M13) starts to resolve into tiny stellar pinpoints.

    The Observer 90 EQ features a 1.25" rack-and-pinion focuser for dialing in the sharpest view. A 90-degree star diagonal inserted in the focuser provides a comfortable viewing angle. The 6x30 crosshair finder scope helps you locate your targets.

    The Observer's sturdy equatorial mount can be quickly polar-aligned to allow easy "tracking" of celestial objects as they move slowly across the sky, using just one of the two slow-motion knobs. Use both to center objects in the telescope's field of view. The extendable aluminum tripod provides solid support, and has an accessory tray to keep your extra eyepiece and Barlow within easy reach.

    The telescope weighs under 17 lbs. total, including the easily removable counterweight, so it's easy to take outside for impromptu observing sessions.

    Warranty

    Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.

    Warning

    Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

  • Specs
    • Best for viewing:
      Lunar & planetary
    • User level:
      Beginner
    • Optical design:
      Refractor
    • Optical diameter:
      90mm
    • Focal length:
      900mm
    • Focal ratio:
      f/10.0
    • Coatings:
      Fully coated
    • Optics type:
      Air-spaced doublet
    • Glass material:
      Crown/Flint
    • Eyepieces:
      Plossl 25.0mm,10.0mm (1.25")
    • Magnification with included eyepieces:
      36x, 90x
    • Resolving power:
      1.29arc*sec
    • Lowest useful magnification:
      13x
    • Highest useful magnification:
      180x
    • Highest theoretical magnification:
      180x
    • Limiting stellar magnitude:
      12.5
    • Optical quality:
      Diffraction limited
    • Finder scope:
      6x30
    • Focuser:
      1.25" Rack-and-pinion
    • Diagonal degrees:
      1.25" 90° Mirror Star
    • Mirror coatings/over-coatings:
      Aluminum & Silicon Dioxide
    • Mount type:
      Equatorial
    • Dovetail bar system:
      Yes
    • Setting circles:
      Yes
    • Polar-axis scope:
      Not available
    • Counterweights:
      One 4 lb.
    • Tube material:
      Aluminum
    • Tripod material:
      Aluminum
    • Counterweight bar length:
      8 in.
    • Diameter of counterweight shaft:
      13mm
    • Height range of mount:
      37.50 in. - 69.50 in.
    • Length of optical tube:
      34.0 in.
    • Weight, optical tube:
      4.7 lbs.
    • Weight, mount/tripod:
      11.4 lbs.
    • Weight, fully assembled:
      16.1 lbs.
    • Additional included accessories:
      Other included items are not always the same between a new and a second. Seconds may be older versions of the new product, or may be customer returns where accessory substitutions have been made.
    • Other features:
      2nds are covered by Orion's Satisfaction Guarantee
    • Warranty:
      One year
  • Important Shipping Information

    Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

    A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

    Standard Delivery: $0.00
    3 Day Delivery: $25.00
    2 Day Delivery: $25.00
    Next Day Delivery: $25.00

    SHIPPING RESTRICTIONS APPLY FOR THIS PRODUCT

    This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.