Apertura 8" f/4 Imaging Newtonian OTA - 8F4N

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Item #APER-8F4N

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  • 8" f/4 Imaging Newtonian OTA
  • Optical tube assembly has a center-spotted parabolic primary mirror
  • Equipped with diffraction-limited optics
  • Includes dual-speed 2" Crayford focuser
  • Low-vibration cooling fan is mounted on the primary mirror cell
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  • Description

    Apertura 8" f/4 Imaging Newtonian OTA

    The Apertura 8" f/4 Imaging Newtonian OTA has everything you need for wide-field imaging!

    Newtonian Telescope Build

    The 32" long OTA is made of rolled steel for added durability and has a diameter of 9". The 8" f/4 Newtonian optical tube assembly has a center-spotted parabolic primary mirror. The four secondary mirror vanes are as thin as possible while maintaining stability. Equipped with diffraction-limited optics, the parabolic primary mirror is housed in an aluminum cell fitted with six "push/pull" collimation knobs so that you can collimate without tools.


    The dual-speed 2" Crayford focuser includes linear bearings and a monorail that create a sturdy draw tube and reduce drag under heavy loads. Achieve focus with the larger of the two knobs, and then tweak your focus with the small 10:1 micro-focusing knob. The two other knobs on the focuser are a tension knob, allowing adjustments for the drag on the draw tube to match the weight of the load, and a focuser lock. A 35mm extension tube and a 2" to 1.25" compression ring adapter are included to add to the OTA's viewing capabilities.

    Mounting the Apertura OTA

    The 8" Newtonian can be attached to a wide variety of equatorial mounts. A pair of felt-lined split tube rings is included with the OTA. These rings can be attached by using either the Vixen-sized dovetail that is included or add your own Losmandy-style dovetail plate to the rings (sold separately). The High Point 8" Newtonian OTA also has a dovetailed finder adapter attached and accepts the included 50mm finderscope bracket. An 8x50 straight-through optical finderscope slides easily into this bracket.

    Cooling Feature

    Sometimes it seems to take forever for your telescope to cool to ambient temperature. The High Point 8" f/4 Imaging Newtonian has a built-in cooling fan will help get your imaging faster. This low-vibration fan is mounted on the primary mirror cell and is powered by a battery pack that holds eight (8) AA batteries (batteries not included).

    This Product Comes with the Apertura Absolute Warranty!

      • Two-Year Warranty against product defects.


      • Three-Year Accident Replacement Program that begins after your initial 2 year warranty expires.


      • Your Apertura Absolute Warranty is transferable.


    Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!

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    What's Included

    • 8" f/4 Imaging Newtonian OTA

    • Cooling Fan for Primary

    • 2" 10:1 Linear Crayford Focuser

    • 2" to 1.25" Adapter

    • Cradle Rings

    • Vixen-Style Dovetail Plate

    • 35mm 2" Extension Tube

    • 8x50 Straight Thru Finder and Bracket

    • Dust Cover

  • Dimensions & Specifications

    • Model Number : 8F4N
    • Telescope Series: GSO Imaging Newtonians
    • Telescope Optical Design: Newtonian Reflector
    • Telescope Aperture: 8"
    • Telescope Focal Ratio: f/4
    • Telescope Focal Length: 800mm
    • Optical Coatings: Aluminum and Quartz
    • Finder Included: Yes - 8 x 50 Finder Included
    • Focuser Style: Crayford/Crayford Style
    • Focuser Size: 2"
    • Focuser Speed: Dual Speed
    • Telescope OTA Diameter: 9"
    • Telescope OTA Length: 32"
    • Telescope OTA Weight: 18lb
    • Telescope OTA Weight with Accessories: 21.6lb

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Apertura Absolute Warranty: Initial 2 year warranty against product defects, followed by a 3 year accident replacement program.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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