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GSO 12" f/4 Imaging Newtonian - Truss Tube OTA - 12F4TN

SKU: GSO-12F4TN

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GSO 12" f/4 Truss Imaging Newtonian OTA



This GSO 12" carbon fiber truss tube Newtonian reflector is a great choice for deep-sky wide field imaging, especially with the addition of the optional High Point Coma Corrector! The fast 12" f/4 imaging Newtonian optical tube assembly has diffraction-limited optics, three primary mirror cooling fans, and a secondary mirror that has been optimized for full field photographic illumination. The sturdy 2" Crayford focuser has linear bearings that result in a rigid draw tube and virtually no flexure. You can easily attach a 35mm DSLR camera or large format CCD/CMOS imaging camera and be confident in the mechanical build of the GSO 12" f/4 Newtonian Truss Tube Telescope.



The 12" imaging Newtonian carbon fiber truss tube OTA is 39.5" long and weighs 51 pounds. The diffraction limited parabolic primary mirror has an aluminum coating with 96% reflectivity, and a top coat of quartz for protection. Both the primary and secondary mirrors of this Newtonian truss tube telescope have light shields built into the inside of the truss tube assembly to keep ambient light from bouncing off the mirror and reducing contrast. The primary mirror cell is fitted with three low-vibration cooling fans to help your optics reach ambient temperature as quickly as possible. An included battery pack holds 8-AA batteries (user supplied), and this battery pack supplies power to the fans.



The 12" Imaging Newtonian Truss Tube Telescope includes two Losmandy-style D-Series dovetails. Use one to mount the OTA onto your equatorial mount, and the other can ride on top and accept a guidescope, etc. Keep in mind that the GSO 12" f/4 Truss OTA weighs just about 51 pounds, and will require a mount that can handle a pretty substantial payload. A good option would be the Celestron CGE Pro, the Losmandy Titan, the Paramount, or the Meade LX850. The GSO 12" Newtonian 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.



The GSO 12" f/4 Reflector OTA comes with a heavy-duty 2" linear-bearing Crayford 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, which is common for standard Crayford focusers. This focuser also sports dual focusing knobs for precision focusing pleasure. You can achieve rough focus with the larger of the two knobs, and then tweak your focus with the smaller 10:1 micro-focusing knob. There are two other knobs on the focuser: A tension knob allows you to adjust the drag on the draw tube to match the weight of the load, and the second knob locks the focus in place; a real help when 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, as well as a 2" 35mm Extension Tube (just in case you need extra length to help you reach focus) are included as standard equipment.



Description
Description

GSO 12" f/4 Truss Imaging Newtonian OTA

This GSO 12" carbon fiber truss tube Newtonian reflector is a great choice for deep-sky wide field imaging, especially with the addition of the optional High Point Coma Corrector! The fast 12" f/4 imaging Newtonian optical tube assembly has diffraction-limited optics, three primary mirror cooling fans, and a secondary mirror that has been optimized for full field photographic illumination. The sturdy 2" Crayford focuser has linear bearings that result in a rigid draw tube and virtually no flexure. You can easily attach a 35mm DSLR camera or large format CCD/CMOS imaging camera and be confident in the mechanical build of the GSO 12" f/4 Newtonian Truss Tube Telescope.

The 12" imaging Newtonian carbon fiber truss tube OTA is 39.5" long and weighs 51 pounds. The diffraction limited parabolic primary mirror has an aluminum coating with 96% reflectivity, and a top coat of quartz for protection. Both the primary and secondary mirrors of this Newtonian truss tube telescope have light shields built into the inside of the truss tube assembly to keep ambient light from bouncing off the mirror and reducing contrast. The primary mirror cell is fitted with three low-vibration cooling fans to help your optics reach ambient temperature as quickly as possible. An included battery pack holds 8-AA batteries (user supplied), and this battery pack supplies power to the fans.

The 12" Imaging Newtonian Truss Tube Telescope includes two Losmandy-style D-Series dovetails. Use one to mount the OTA onto your equatorial mount, and the other can ride on top and accept a guidescope, etc. Keep in mind that the GSO 12" f/4 Truss OTA weighs just about 51 pounds, and will require a mount that can handle a pretty substantial payload. A good option would be the Celestron CGE Pro, the Losmandy Titan, the Paramount, or the Meade LX850. The GSO 12" Newtonian 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.

The GSO 12" f/4 Reflector OTA comes with a heavy-duty 2" linear-bearing Crayford 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, which is common for standard Crayford focusers. This focuser also sports dual focusing knobs for precision focusing pleasure. You can achieve rough focus with the larger of the two knobs, and then tweak your focus with the smaller 10:1 micro-focusing knob. There are two other knobs on the focuser: A tension knob allows you to adjust the drag on the draw tube to match the weight of the load, and the second knob locks the focus in place; a real help when 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, as well as a 2" 35mm Extension Tube (just in case you need extra length to help you reach focus) are included as standard equipment.

Specifications
Specifications
Model Number 12F4TN
Telescope Series GSO Imaging Newtonians
Focal Ratio f/4
Optical Design Newtonian Reflector
Telescope Aperture 305mm (12")
Telescope Mount Type No Mount - OTA Only
Type of Electronics OTA Only - No Electronics
Focal Length (mm) 1220
Optical Coatings aluminum, quartz
Focuser Style Crayford/Crayford Style
Focuser Size 2"
Focuser Speed Dual Speed
Telescope OTA Length (in.) 39.5
Telescope OTA Weight (lb.) 51
Warranty GSO 2 Years
What's in the Box?
What's in the Box?
  • 12" f/4 Truss Tube Newtonian OTA
  • Three Primary Mirror Cooling Fans
  • 2" 10:1 Linear Dual-Speed Crayford Focuser
  • 2" to 1.25" Adapter
  • Two Losmandy-Style Dovetail Plates
  • 35 mm Extension Tube - 2"
  • 8x50 Straight Thru Finder and Bracket
  • GSO 12" f/4 Truss Tube Imaging Newtonian
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