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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.
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Original price $0.00 - Original price $0.00Original price $0.00$1,399.00$1,399.00 - $1,399.00Current price $1,399.00Astro-Tech AT115EDT f/7 ED Triplet Refractor OTA
Astro-TechIn StockThe Astro-Tech AT115EDT 4.53" f/7 ED triplet apochromatic refractor offers more performance and features than similarly-priced smaller aperture com...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$1,399.00$1,399.00 - $1,399.00Current price $1,399.00 -
Original price $1,849.00 - Original price $1,849.00Original price$1,849.00$1,849.00 - $1,849.00Current price $1,849.00Astro-Tech AT125EDL Refractor OTA FCD-100 and Lanthanum f/7.8 Doublet
Astro-TechIn StockThe Astro-Tech AT125EDL takes the performance of the it smaller siblings and combines it with the mechanics of the EDT line. This Astro-Tech ED ref...
View full detailsOriginal price $1,849.00 - Original price $1,849.00Original price$1,849.00$1,849.00 - $1,849.00Current price $1,849.00 -
Original price $2,999.99 - Original price $2,999.99Original price$2,999.99$2,999.99 - $2,999.99Current price $2,999.99Explore Scientific 127mm f/7.5 Carbon Fiber FCD100 ED Triplet Refractor
Explore ScientificIn StockThis big 127mm (5") Explore Scientific Carbon Fiber air-spaced ED triplet apochromatic refractor is loaded with quality optical performance at a su...
View full detailsOriginal price $2,999.99 - Original price $2,999.99Original price$2,999.99$2,999.99 - $2,999.99Current price $2,999.99 -
Original price $550.00 - Original price $550.00Original price$550.00$550.00 - $550.00Current price $550.00Sky-Watcher Skymax 127 f/11.8 Maksutov-Cassegrain Optical Tube
Sky-WatcherIn StockThe Sky-Watcher 127mm Maksutov-Cassegrain folded optical system is a compact optical powerhouse capable of producing sharp, high contrast images in...
View full detailsOriginal price $550.00 - Original price $550.00Original price$550.00$550.00 - $550.00Current price $550.00 -
Original price $749.99 - Original price $749.99Original price$749.99$749.99 - $749.99Current price $749.99Explore Scientific AR127 5" f/6.5 Achromatic Doublet Refractor Optical Tube
Explore ScientificIn StockThis 5" Explore Scientific achromatic refractor optical tube is a big performer, both inside the solar system and out in the realm of the nebulas a...
View full detailsOriginal price $749.99 - Original price $749.99Original price$749.99$749.99 - $749.99Current price $749.99 -
Original price $2,499.00 - Original price $2,499.00Original price$2,499.00$2,499.00 - $2,499.00Current price $2,499.00Explore Scientific 127mm f/7.5 Classic White FCD100 ED Triplet Refractor
Explore ScientificIn StockThis big 127mm (5") Explore Scientific Essential Series air-spaced ED triplet apochromatic refractor is loaded with quality optical performance at ...
View full detailsOriginal price $2,499.00 - Original price $2,499.00Original price$2,499.00$2,499.00 - $2,499.00Current price $2,499.00 -
Original price $4,165.00 - Original price $4,165.00Original price$4,165.00$4,165.00 - $4,165.00Current price $4,165.00Sky-Watcher Esprit 120mm f/7 ED Apochromatic Triplet Refractor With Field Flattener S11420
Sky-WatcherIn StockThe big Sky-Watcher Esprit 120mm ED apochromatic triplet refractor with thread-on field flattener combines premium high contrast/high resolution im...
View full detailsOriginal price $4,165.00 - Original price $4,165.00Original price$4,165.00$4,165.00 - $4,165.00Current price $4,165.00 -
Original price $2,490.00 - Original price $2,490.00Original price$2,490.00$2,490.00 - $2,490.00Current price $2,490.00Sky-Watcher Evostar 120mm f/7.5 ED Doublet Apochromatic Refractor S11130
Sky-WatcherIn StockThis 120mm Sky-Watcher Evostar 120ED is a premium doublet apochromatic refractor with highly-reviewed high contrast/high resolution optics that Sky...
View full detailsOriginal price $2,490.00 - Original price $2,490.00Original price$2,490.00$2,490.00 - $2,490.00Current price $2,490.00 -
Original price $3,499.99 - Original price $3,499.99Original price$3,499.99$3,499.99 - $3,499.99Current price $3,499.99
Explore Scientific 115mm f/5.5 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hexagonal Focuser
Explore ScientificSold OutThe 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 detailsOriginal price $3,499.99 - Original price $3,499.99Original price$3,499.99$3,499.99 - $3,499.99Current price $3,499.99Sold out -
Original price $5,240.00 - Original price $5,240.00Original price$5,240.00$5,240.00 - $5,240.00Current price $5,240.00Takahashi TSA-120 4.7" F/7.5 Ortho-Apochromat Triplet Refractor OTA
TakahashiMore on the wayThis Takahashi TSA-120 4.72" ED triplet refractor puts true-color "super apochromat" optical excellence in a portable 15.4 lb. package. This Takaha...
View full detailsOriginal price $5,240.00 - Original price $5,240.00Original price$5,240.00$5,240.00 - $5,240.00Current price $5,240.00 -
Original price $8,110.00 - Original price $8,110.00Original price$8,110.00$8,110.00 - $8,110.00Current price $8,110.00Takahashi TOA-130NFB 5.1" Ortho-Apochromat Triplet Refractor OTA
TakahashiMore on the wayThis performance of this 4" focuser Takahashi 5.1" ED triplet refractor is too good to let it be called simply an apochromatic scope. Only the term...
View full detailsOriginal price $8,110.00 - Original price $8,110.00Original price$8,110.00$8,110.00 - $8,110.00Current price $8,110.00 -
Original price $7,200.00 - Original price $7,200.00Original price$7,200.00$7,200.00 - $7,200.00Current price $7,200.00Takahashi TOA-130NS 5.1" f/7.7 Ortho-Apochromat Triplet Refractor OTA
TakahashiMore on the wayThis performance of this Takahashi 5.1" ED triplet refractor is too good to let it be called simply an apochromatic scope. Only the term ortho-apoc...
View full detailsOriginal price $7,200.00 - Original price $7,200.00Original price$7,200.00$7,200.00 - $7,200.00Current price $7,200.00 -
Original price $1,799.99 - Original price $1,799.99Original price$1,799.99$1,799.99 - $1,799.99Current price $1,799.99Explore Scientific ES127 127mm f/7.5 "Essential Series" FCD-1 ED Triplet Refractor
Explore ScientificIn StockThis big 127mm (5") Explore Scientific Essential Series air-spaced ED triplet apochromatic refractor is loaded with quality optical performance at ...
View full detailsOriginal price $1,799.99 - Original price $1,799.99Original price$1,799.99$1,799.99 - $1,799.99Current price $1,799.99 -
Original price $2,299.00 - Original price $2,299.00Original price$2,299.00$2,299.00 - $2,299.00Current price $2,299.00ZWO FF107 APO OTA
ZWOMore on the wayThe ZWO FF series is a potential fit for your astro-photography needs. The ZWO FF107 APO is a finely crafted, high-performance apochromatic refrac...
View full detailsOriginal price $2,299.00 - Original price $2,299.00Original price$2,299.00$2,299.00 - $2,299.00Current price $2,299.00 -
Original price $7,373.00 - Original price $7,373.00Original price$7,373.00$7,373.00 - $7,373.00Current price $7,373.00TeleVue NP127Is 5" f/5.2 Nagler-Petzval Apochromatic Refractor
TeleVueMore on the wayThe 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 detailsOriginal price $7,373.00 - Original price $7,373.00Original price$7,373.00$7,373.00 - $7,373.00Current price $7,373.00 -
Original price $1,899.00 - Original price $1,899.00Original price$1,899.00$1,899.00 - $1,899.00Current price $1,899.00Astro-Tech AT106EDQ f/7 Quad Refractor
Astro-TechMore on the wayThis Astro-Tech AT106EDQ ED refractor has: • 106mm f/7 fully multicoated four-lens/two-group refractor• two ED lens elements• amazing flat field as...
View full detailsOriginal price $1,899.00 - Original price $1,899.00Original price$1,899.00$1,899.00 - $1,899.00Current price $1,899.00 -
Original price $7,330.00 - Original price $7,330.00Original price$7,330.00$7,330.00 - $7,330.00Current price $7,330.00Takahashi FSQ-106EDX4 4.2" F/5 Dual ED/Four Element Optical Tube
TakahashiMore on the wayThis Takahashi FSQ-106EDX4 quadruplet is the ultimate portable no-compromise photo/visual refractor. The Takahashi FSQ-106EDX4 quadruplet is a rede...
View full detailsOriginal price $7,330.00 - Original price $7,330.00Original price$7,330.00$7,330.00 - $7,330.00Current price $7,330.00 -
Original price $2,499.00 - Original price $2,499.00Original price$2,499.00$2,499.00 - $2,499.00Current price $2,499.00
Astro-Tech AT126EDQ f/7 Quad Refractor
Astro-TechMore on the wayThis Astro-Tech AT126EDQ ED refractor has: • 126mm f/7 fully multicoated four-lens/two-group refractor• two ED lens elements• amazing flat field as...
View full detailsOriginal price $2,499.00 - Original price $2,499.00Original price$2,499.00$2,499.00 - $2,499.00Current price $2,499.00
