Apertura 6" f/4 Imaging Newtonian OTA - 6F4N

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Apertura 6" f/4 Imaging Newtonian OTA - 6F4N has a rating of 5.0 stars based on 1 reviews.

Item #APER-6F4N

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  • 6" f/4 Imaging Newtonian OTA

  • Easily attach a 35mm DSLR camera, webcam, or CCD/CMOS imaging camera
  • Optical tube is made of rolled steel for added durability
  • Extended tube in front of the focuser serves as a built-in light/dew shield

  • Includes Crayford focuser

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  • Description

    Apertura 6" f/4 Imaging Newtonian OTA

    The Apertura 6" f/4 Imaging Newtonian OTA is a great introductory telescope that has everything you need to start observing!

    The OTA is 22.5" long and made of rolled steel for added durability. The diameter is 7". The optical tube assembly is painted white.

    This 6" f/4 Newtonian from Apertura has an extended tube in front of the focuser that serves as a built-in light/dew shield, and it is equipped with diffraction-limited optics.

    The OTA length forward from the focuser has been extended, increasing contrast by keeping stray light from hitting the secondary mirror.

    Included Accessories

    The rigid 2" Crayford focuser has linear bearings that create a sturdy draw tube and almost no flexure. It is different from standard Crayford focusers found on most reflectors. With this focuser, there is less wear on the focuser draw-tube, less flexure, and more rigidity due to design differences that support the drive rail and draw-tube along the length of travel instead of at a few contact points. This 2" linear bearing focuser also sports dual-speed 1:10 focus, a tension lock knob, and a focus lock knob so that your focus point stays put while imaging. The draw tube has 2" of travel and has a focusing scale marked on the top to help you come back to the same focus point again and again. A 2" to 1.25" compression ring adapter is included as standard equipment.

    A 35mm extension tube is included to add to the OTA's viewing capabilities.

    A Vixen-style mounting plate and a pair of felt-lined split tube rings are also included. The 6" Newtonian can be attached to a wide variety of equatorial mounts by using either the included Vixen-sized dovetail or by adding your own Losmandy-style dovetail plate (not included) to the rings. The Apertura 6" Newtonian OTA also has a quick-release finder adapter and accepts the included 50mm finderscope bracket. An 8x50 straight-through optical finderscope slides easily into this bracket.

    Camera Compatibility

    Easily attach a 35mm DSLR camera, webcam, or CCD/CMOS imaging camera for beautiful astrophotography.


    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

    • 6" f/4 Imaging Newtonian OTA
    • 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: 6F4N
    • Telescope Series: GSO Imaging Newtonians
    • Telescope Optical Design: Newtonian Reflector
    • Telescope Aperture: 6"
    • Telescope Focal Ratio: f/4
    • Telescope Focal Length: 610mm
    • Finder Included: Yes - 8 x 50 Finder Included
    • Focuser Style: Crayford/Crayford Style
    • Focuser Size: 2"
    • Focuser Speed: Dual Speed
    • Telescope OTA Diameter: 7"
    • Telescope OTA Length: 22.5"
    • Telescope OTA Weight: 9.63 lb

  • 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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