grid-imggrid-active-img list-imglist-active-img
Showing 1–12 of 28 results
  • Celestron 11″ Rowe-Ackermann Schmidt Astrograph (RASA) f/2.2, V2 Optical Tube Assembly (OTA Only)

    $3,599.00
    • Fast, wide-field 11” f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature
    • Large 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors
    • New Ultra-Stable Focus System (USFS) minimizes focus shift and mirror flop
    • Integrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress
    • Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras
    Add to cart
  • Celestron 36cm (14″) Rowe-Ackermann Schmidt Astrograph (RASA) f/2.2 Optical Tube Assembly (OTA Only)

    $13,999.00

    This larger version of the original Celestron 11″ RASA was developed for the field of Space Situational Awareness (SSA). SSA is a project dedicated to detecting and mapping space junk in orbit.

    In 2015, SSA professionals discovered the smaller 11″ RASA is an ideal instrument for this application. With its fast focal ratio and wide field of view it can detect even small pieces of space junk traveling at extraordinarily high speeds. There are now dozens of RASA telescopes in use around the world every night scanning the skies to protect satellites, at a fraction of the cost of other systems!

    Celestron’s team collaborated with SSA experts to develop an even better telescope to meet this important need. The result is the 14″ RASA 36 which can detect individual pieces of debris measuring less than 1 meter!

    Add to cart
  • Celestron 8″ Rowe-Ackermann Schmidt Astrograph (RASA) f/2 Optical Tube Assembly (OTA Only)

    $1,699.00
    • Incredible clarity from edge to edge of your image circle
    • Portable and powerful for professionals and amateurs alike
    • Aperture: 203 mm (8-inch)
    • Telescope weight: 17 lbs.
    • Back focus: 29 mm (25 mm with included adapters).
    • Optimized for sensors with a 22 mm diagonal.
    • PLEASE NOTE: The 8-inch RASA will not work with standard DSLR + T-Ring systems.
    Add to cart
  • FIN200 – Farpoint Imaging Newtonian Telescope, 203mm, f/4

    $3,000.00

    FIN200

    First 10 adopters get a $1,000 discount! Allow 3 weeks from receipt of order for shipment. Please contact support@opticalstructures.com when you place your order.

    FIN200 – Farpoint Imaging Newtonian Reflecting Telescope, 203mm (8 inch) f/4 (also available in f/6)

    Includes: FIN200–f/4, ASCOM Robotic Focuser, Farpoint 2 Inch Collimation Kit, and much more! See “What’s in the Box?” tab for details!

    Add to cart
  • FIN200 – Farpoint Imaging Newtonian Telescope, 203mm, f/6

    $2,500.00

    FIN200

    Farpoint Imaging Newtonian Reflecting Telescope, 203mm (8 inch) f/6 (also available in f/4)

    Includes: FIN200–f/6, ASCOM Robotic Focuser, Farpoint 2 Inch Collimation Kit, and much more! See “What’s in the Box?” tab for details!

    First 10 adopters get a $1,000 discount! Allow 3 weeks from receipt of order for shipment. Please contact support@opticalstructures.com when you place your order.

     

    Add to cart
  • Takahashi CCA-250 Modified Cassegrain OTA

    $21,000.00

    The CCA-250 is Takahashi’s modified Ritchey–Chrétien, developed as a replacement to the BRC-250 and is designed with imaging in mind.  The CCA-250 produces a flat field across an 88 mm image circle.  At prime focus, it is a 250-mm aperture, f/5.0 astrograph.  Coupled with a reducer, it becomes a fast f/3.6 telescope.  The CCA-250 has a carbon fiber tube and a temperature compensated lens cell to maintain focus during long exposures.  The CCA-250 also has an ASCOM compliant active focus system that enables computer control of the focusing system.

     

    Add to cart
  • Takahashi CCA-250 Modified Cassegrain OTA 250-mm f/5.0 astrograph

    $15,000.00

    Specifications:

    Aperture: 250mm

    Back Focus: 193.9mm

    Camera/Eyepiece Connection: 1.25″ Nosepiece

    Corrected Image Circle: 88mm

    Dawes Limit: 0.46 arcseconds

    Focal Length: 1250 mm

    Focal Ratio: f/5

    Highest Magnification: 500x

     

    Add to cart
  • Takahashi Epsilon E-130D Reflector OTA

    $2,600.00

    The Epsilon series of astrographs are specifically designed for exceptional astrophotography.  Takahashi’s proprietary optical design features a hyperbolic, concave primary mirror with a 2 element ED corrector lens to eliminate spherical aberration and coma.  Compared to the conventional Schmidt camera design, the chromatic aberration is reduced by half, even out to large viewing angles.

    The new ε-130D is the same aperture as the original but now uses a digital corrector. This corrector produces improved sharpness and a 1/3rd reduction in the size of the spot equaling the spot size of the E-180 at the edge producing a 44 mm diameter circle. The offset secondary insures better illumination of the image formed by the primary.

    The ε-130D has a 5.9° field of view which is perfect for imaging wide field objects like comets and objects with extended nebulosity. With a speed of f/3.3 and a focal length of 430mm the ε-130D will shorten exposure times, increase color saturation and will produce wide field high performance images.

    Add to cart
  • Takahashi Epsilon E-180D Reflector OTA

    $4,800.00

    The Takahashi Epsilon-180ED (D=180mm, F/2.8), based on catadioptric telescope design (means association of lenses and mirrors) offers a fundamental innovation compared with Newton reflector or Schmidt astrograph. Therefore, the Epsilon-180ED suits both visual observation and large field imaging needs.

    The Epsilon-180ED wide field is perfectly flat and allows the use of traditional photographic formats as 24×36 (35mm) or 6×6 and even 6×9. Stellar images of less 20µ can be recorded, which highlights the extreme accuracy of this telescope. Epsilon’s images provide incomparable contrast and sharpness.

     

    Add to cart
  • Takahashi Epsilon-130D Astrograph OTA

    $2,600.00

    Specifications:

    • Aperture: 130mm
    • Focal Length: 430mm
    • Focal Ratio: f/3.3
    • Image Circle Diameter: 44mm
    • Optical Type: Modified Hyperbolic Newtonian
    • Tube Diameter: 166mm
    • Tube Length (with lens hood retracted): 460mm
    • Tube Weight: 4.9kg
    • Metal Back Distance: 56.2mm
    Add to cart
  • Takahashi Epsilon-180D Astrograph OTA

    $4,800.00

    Specifications:

    • Aperture: 180mm
    • Focal Length: 500mm
    • Focal Ratio: f/2.8
    • Image Circle Diameter: 44mm
    • Optical Type: Modified Hyperbolic Newtonian
    • Tube Diameter: 232mm
    • Tube Length (with lens hood retracted): 570mm
    • Tube Weight: 22lbs
    • Metal Back Distance: 56.2mm
    Add to cart
  • Takahashi FC-100DF Refractor OTA

    $2,440.00

    The Takahashi FC-100D is Takahashi’s latest update to the 100mm fluorite refractor.  The FC-100D uses the Steinheil design with the fluorite element in the rear and an eco-glass front element.  This apochromatic telescope provides outstanding views, both visually and with digital imaging hardware.

    • Great for visual and astrophotography
    • Optional accessories for planetary and deep space imaging
    • Larger 100 mm aperture great high contrast views
    • Excellent for viewing galaxies, globular clusters, nebulae, and planets
    • Rear Flourite element for optimum color correction
    Add to cart