Skip to content
Trusted advice since 1979 Excellent 4.5 rating on Google Reviews Free Shipping On Orders Over $100

OTA

The optical tube is really the heart of your night time exploration.  Sizes range from 50mm to 20" in diameter as well as f/ratios from f/2.2 to f/15.  The optical designs range from simple doublet refractors to complex cassegrains with built-in field flatteners.  There is literally something for everyone here, you just have to decide what path you want to walk down.  We are always here to help with any questions you have.

Filters

$
$
  • $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00

    Astro-Tech AT72EDII Refractor OTA FPL-53 and Lanthanum f/6 Doublet

    Astro-Tech
    In Stock

    The Astro-Tech AT72EDII takes the performance, and mechanics, of the "product everyone should own" (thank you Astronomy Magazine) and gives it an u...

    View full details
    $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00
  • $419.00 - $419.00
    $419.00
    $419.00 - $419.00
    $419.00

    Astro-Tech AT60ED 60mm f/6 FPL-53ED and Lanthanum Doublet

    Astro-Tech
    In Stock

    This Astro-Tech ED refractor has: 60mm f/6 fully multicoated FPL-53 and Lanthanum doublet refractor optics dual-speed Rack and Pinion 2” focuser w...

    View full details
    $419.00 - $419.00
    $419.00
    $419.00 - $419.00
    $419.00
  • $0.00 - $0.00
    $0.00
    $899.00
    $899.00 - $899.00
    $899.00

    Astro-Tech AT80EDT f/6 ED Triplet Refractor OTA

    Astro-Tech
    More on the way

    For the backyard grab-and-go observer, for the Milky Way star field scanner, for the wide field imager, for the birder and terrestrial photographer...

    View full details
    $0.00 - $0.00
    $0.00
    $899.00
    $899.00 - $899.00
    $899.00
  • $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $329.00

    Astro-Tech AT70ED 2.8" f/6 ED Refractor OTA

    Astro-Tech
    In Stock

    This Astro-Tech AT70ED refractor has: 70mm f/6 fully multicoated doublet optics using FK-61 ED glass dual-speed 2" Rack and Pinion focuser 2" and ...

    View full details
    $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $329.00
  • Save $249.00 Save $0.00
    $849.00
    $849.00 - $849.00
    $849.00
    $600.00
    $600.00 - $600.00
    $600.00

    Astro-Tech AT60EDP 60mm f/5 Dual ED Petzval OTA

    Astro-Tech
    In Stock

    This unique Astro-Tech apochromatic ED petzval fast focal ratio refractor has an incredible flat field for your astro-photography endeavors.  This ...

    View full details
    $849.00
    $849.00 - $849.00
    $849.00
    $600.00
    $600.00 - $600.00
    $600.00
    Save $249.00 Save $0.00
  • $1,595.00 - $1,595.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00

    Astro-Tech AT90CFT Limited Edition f/6 Triplet APO Refractor Carbon Fiber OTA

    Astro-Tech
    In Stock

      This Astro-Tech AT90CFT refractor has: • 90mm f/6 apochromatic triplet optics using an FCD-100 ED element• 2.5" dual-speed rotating rack and pini...

    View full details
    $1,595.00 - $1,595.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00
  • $3,210.00 - $3,210.00
    $3,210.00
    $3,210.00 - $3,210.00
    $3,210.00

    Sky-Watcher Esprit 100mm f/5.5 ED Apochromatic Triplet Refractor With Field Flattener S11410

    Sky-Watcher
    More on the way

    The Sky-Watcher Esprit 100mm ED apochromatic triplet refractor has the premium high contrast/high resolution/flat field optical performance you nee...

    View full details
    $3,210.00 - $3,210.00
    $3,210.00
    $3,210.00 - $3,210.00
    $3,210.00
  • $540.00 - $540.00
    $540.00
    $540.00 - $540.00
    $540.00

    Sky-Watcher Evostar 72mm f/5.8 ED Doublet Apochromatic Refractor

    Sky-Watcher
    In Stock

    The Evostar 72ED is a portable powerhouse. It is true that great things can come in a small package.. This Sky-Watcher Evostar 72ED apochromatic re...

    View full details
    $540.00 - $540.00
    $540.00
    $540.00 - $540.00
    $540.00
  • Astro-Tech AT90EDX side view
    Astro-Tech AT90EDX 3 quarter view
    $1,595.00 - $1,595.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00

    Astro-Tech AT90EDX f/6 Triplet APO Refractor OTA

    Astro-Tech
    In Stock

    This Astro-Tech AT90EDX refractor has: 90mm f/6 apochromatic triplet optics using an FCD-100 ED element guaranteed .95 strehl ratio or higher opti...

    View full details
    $1,595.00 - $1,595.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00
  • $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00

    Sky-Watcher Evoguide 50DX APO Refractor/ Guidescope S11174

    Sky-Watcher
    In Stock

    Sky-Watcher EvoGuide 50DX 50mm ED APO Refractor / Guidescope The Sky-Watcher EvoGuide 50DX brings apochromatic performance to a compact, lightweigh...

    View full details
    $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00
  • $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99

    Explore Scientific 80mm f/6 ED Classic White Tube FCD100 Series APO Triplet Refractor

    Explore Scientific
    In Stock

    This 80mm Explore Scientific FCD100 ED triplet apochromatic refractor is loaded with premium glass for outstanding viewing sessions night after nig...

    View full details
    $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99
  • $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99

    Explore Scientific ES80 80mm f/6 ED "Essential Series" FCD-1 ED APO Triplet Refractor

    Explore Scientific
    In Stock

    This 80mm Explore Scientific "Essential Series" ED triplet apochromatic refractor is loaded with features and is priced hundreds of dollars less th...

    View full details
    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99
  • Sold out
    $3,499.99 - $3,499.99
    $3,499.99
    $3,499.99 - $3,499.99
    $3,499.99

    Explore Scientific 115mm f/5.5 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hexagonal Focuser

    Explore Scientific
    Sold Out

    The Explore Scientific 115mm f/5.5 FPL53 APO triplet could be the perfect combination telescope. Just big enough to do great observation and fast e...

    View full details
    $3,499.99 - $3,499.99
    $3,499.99
    $3,499.99 - $3,499.99
    $3,499.99
    Sold out
  • $2,230.00 - $2,230.00
    $2,230.00
    $2,230.00 - $2,230.00
    $2,230.00

    Sky-Watcher Esprit 80mm f/5 ED Apochromatic Triplet Refractor With Field Flattener S11400

    Sky-Watcher
    In Stock

    The compact Sky-Watcher Esprit 80mm ED apochromatic triplet refractor has the premium high contrast/high resolution optical performance you need to...

    View full details
    $2,230.00 - $2,230.00
    $2,230.00
    $2,230.00 - $2,230.00
    $2,230.00
  • TV-60 60mm f/6 apo body
    $867.00 - $867.00
    $867.00
    $867.00 - $867.00
    $867.00

    TeleVue TV-60 60mm f/6 APO Refractor Body

    TeleVue
    More on the way

    This TeleVue TV-60 is a high performance 2.4" apochromatic doublet scope that will surprise you as much with the magnitude of its performance as it...

    View full details
    $867.00 - $867.00
    $867.00
    $867.00 - $867.00
    $867.00
  • FS-60CB 2.4" F/5.9 fluorite doublet apo
    $1,040.00 - $1,040.00
    $1,040.00
    $1,040.00 - $1,040.00
    $1,040.00

    Takahashi FS-60CB 2.4" f/5.9 Fluorite Doublet APO Refractor

    Takahashi
    More on the way

    This compact Takahashi refractor optical tube makes an ideal eclipse scope and a super travel and backyard scope for spur-of-the-moment observing. ...

    View full details
    $1,040.00 - $1,040.00
    $1,040.00
    $1,040.00 - $1,040.00
    $1,040.00
  • $2,140.00 - $2,140.00
    $2,140.00
    $2,140.00 - $2,140.00
    $2,140.00

    Sky-Watcher Starlux 190 Maksutov-Newtonian f/5.3 Optical Tube

    Sky-Watcher
    In Stock

    The Sky-Watcher f/5.3 190mm Maksutov-Newtonian optical system is a quality fast focal ratio performer that excels at deep space imaging and viewing...

    View full details
    $2,140.00 - $2,140.00
    $2,140.00
    $2,140.00 - $2,140.00
    $2,140.00
  • NP101Is 4" f/5.4 Nagler-Petzval apochromatic refractor
    $4,267.00 - $4,267.00
    $4,267.00
    $4,267.00 - $4,267.00
    $4,267.00

    TeleVue NP101Is 4" f/5.4 Nagler-Petzval Apochromatic Refractor

    TeleVue
    More on the way

    This TeleVue NP-101is is a superb and highly portable apochromatic refractor for both visual observing and imaging . . . This updated and improved ...

    View full details
    $4,267.00 - $4,267.00
    $4,267.00
    $4,267.00 - $4,267.00
    $4,267.00
  • FSQ-85ED "Baby Q" 3.35" F/5.3 dual ED/four element design
    $4,280.00 - $4,280.00
    $4,280.00
    $4,280.00 - $4,280.00
    $4,280.00

    Takahashi FSQ-85EDX "Baby Q" 3.35" F/5.3 Dual ED/Four Element Design

    Takahashi
    More on the way

    The new Takahashi FSQ-85ED (the "Baby Q") apochromatic ED quadruplet is a clear leader in the ranks of relatively small aperture refractors. Its fo...

    View full details
    $4,280.00 - $4,280.00
    $4,280.00
    $4,280.00 - $4,280.00
    $4,280.00
  • NP127Is 5" f/5.2 Nagler-Petzval apochromatic refractor
    $7,373.00 - $7,373.00
    $7,373.00
    $7,373.00 - $7,373.00
    $7,373.00

    TeleVue NP127Is 5" f/5.2 Nagler-Petzval Apochromatic Refractor

    TeleVue
    More on the way

    The original Hot Product TeleVue NP-127is has long been regarded as one of the finest optical systems available for both visual observing and imagi...

    View full details
    $7,373.00 - $7,373.00
    $7,373.00
    $7,373.00 - $7,373.00
    $7,373.00
  • FSQ-106ED "New Q" 4.2" F/5 dual ED/four element design
    $7,330.00 - $7,330.00
    $7,330.00
    $7,330.00 - $7,330.00
    $7,330.00

    Takahashi FSQ-106EDX4 4.2" F/5 Dual ED/Four Element Optical Tube

    Takahashi
    More on the way

    This Takahashi FSQ-106EDX4 quadruplet is the ultimate portable no-compromise photo/visual refractor. The Takahashi FSQ-106EDX4 quadruplet is a rede...

    View full details
    $7,330.00 - $7,330.00
    $7,330.00
    $7,330.00 - $7,330.00
    $7,330.00

Compare products

0 of 3 items selected

Select first item to compare

Select second item to compare

Select third item to compare

Compare