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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 $439.00 - Original price $439.00Original price$439.00$439.00 - $439.00Current price $439.00Astro-Tech AT80ED 3.1" f/7 ED Refractor OTA
Astro-TechIn StockThis Astro-Tech AT80ED refractor has: 80mm f/7 fully multicoated doublet optics using FK-61 ED glass dual-speed 2" Rack and Pinion rotatable focus...
View full detailsOriginal price $439.00 - Original price $439.00Original price$439.00$439.00 - $439.00Current price $439.00 -
Original price $649.00 - Original price $649.00Original price$649.00$649.00 - $649.00Current price $649.00Astro-Tech AT102ED 4" f/7 ED Refractor OTA
Astro-TechIn StockThe Astro-Tech AT102ED is a fantastic value and incredible performer. This Astro-Tech AT102ED refractor has: • 102mm f/7 fully multicoated doublet ...
View full detailsOriginal price $649.00 - Original price $649.00Original price$649.00$649.00 - $649.00Current price $649.00 -
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 $1,899.00 - Original price $1,899.00Original price$1,899.00$1,899.00 - $1,899.00Current price $1,899.00Astro-Tech AT130 EDT f/7 ED Triplet OTA
Astro-TechIn StockSome observers feel that the Astro-Tech AT130EDT 5.12" f/7 ED triplet apochromatic refractor compares favorably in performance to scopes nearly fou...
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 $1,199.00 - Original price $1,199.00Original price$1,199.00$1,199.00 - $1,199.00Current price $1,199.00Astro-Tech AT102EDL Refractor OTA FCD-100 and Lanthanum f/7 Doublet
Astro-TechIn StockThe Astro-Tech AT102EDL 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 $1,199.00 - Original price $1,199.00Original price$1,199.00$1,199.00 - $1,199.00Current price $1,199.00 -
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 $979.99 - Original price $979.99Original price$979.99$979.99 - $979.99Current price $979.99Explore Scientific AR152 6" f/6.5 Achromatic Doublet Refractor Optical Tube
Explore ScientificMore on the wayThis 6" Explore Scientific AR152 achromatic refractor optical tube is a sensational value - a big 6" (152mm) and fast f/6.5 refractor that's priced...
View full detailsOriginal price $979.99 - Original price $979.99Original price$979.99$979.99 - $979.99Current price $979.99 -
Original price $4,395.00 - Original price $4,395.00Original price$4,395.00$4,395.00 - $4,395.00Current price $4,395.00Astro-Tech AT152EDT f/8 Triplet APO Refractor OTA
Astro-TechMore on the wayThe Astro-Tech AT152EDT 152mm f/8 Triplet Apochromatic Refractor – A True Lifetime Telescope For those who demand the best in optical performance ...
View full detailsOriginal price $4,395.00 - Original price $4,395.00Original price$4,395.00$4,395.00 - $4,395.00Current price $4,395.00 -
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 $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 $2,995.00 - Original price $2,995.00Original price$2,995.00$2,995.00 - $2,995.00Current price $2,995.00Astro-Tech AT150EDL Refractor OTA FCD-100 and Lanthanum f/8 Doublet with Hard Case
Astro-TechIn StockThe Astro-Tech AT150EDL 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 $2,995.00 - Original price $2,995.00Original price$2,995.00$2,995.00 - $2,995.00Current price $2,995.00 -
Original price $599.99 - Original price $599.99Original price$599.99$599.99 - $599.99Current price $599.99Explore Scientific AR102 4" f/6.5 Achromatic Doublet Refractor Optical Tube
Explore ScientificIn StockThis Explore Scientific 4" refractor has: Big 4" aperture fully multicoated achromatic doublet refractor optics Collimatable objective lens cell ...
View full detailsOriginal price $599.99 - Original price $599.99Original price$599.99$599.99 - $599.99Current price $599.99 -
Original price $1,199.00 - Original price $1,199.00Original price$1,199.00$1,199.00 - $1,199.00Current price $1,199.00
Astro-Tech 8" f/8 Ritchey-Chrétien Astrograph, Steel Tube
Astro-TechSold OutThe steel tube Astro-Tech AT8RC makes premium 8" Ritchey-Chrétien optics for serious deep space imaging available at the lowest price ever. Sky &am...
View full detailsOriginal price $1,199.00 - Original price $1,199.00Original price$1,199.00$1,199.00 - $1,199.00Current price $1,199.00Sold out -
Original price $999.00 - Original price $999.00Original price$999.00$999.00 - $999.00Current price $999.00Celestron 6" f/8 Achromatic Doublet Refractor Optical Tube, CG5/AVX Dovetail
CelestronMore on the wayHere's a sensational value - a big 6" (150mm) achromatic refractor optical tube that's priced like other manufacturers' 80mm scopes. This Celestro...
View full detailsOriginal price $999.00 - Original price $999.00Original price$999.00$999.00 - $999.00Current price $999.00 -
Original price $2,167.00 - Original price $2,167.00Original price$2,167.00$2,167.00 - $2,167.00Current price $2,167.00TeleVue TV-85 3.35" (85mm) f/7 Ivory Tube/Black Trim APO Refractor OTA
TeleVueMore on the wayThe Tele Vue TV-85 refractor has a compact body that's small enough and light enough to take anywhere in the world . . . with apochromatic optics t...
View full detailsOriginal price $2,167.00 - Original price $2,167.00Original price$2,167.00$2,167.00 - $2,167.00Current price $2,167.00 -
Original price $1,099.99 - Original price $1,099.99Original price$1,099.99$1,099.99 - $1,099.99Current price $1,099.99Explore Scientific 102mm f/7 "Essential Series" FCD-1 ED Triplet Refractor
Explore ScientificIn StockThis 102mm (4") Explore Scientific Essential Series air-spaced ED triplet apochromatic refractor is loaded with quality optical performance at a su...
View full detailsOriginal price $1,099.99 - Original price $1,099.99Original price$1,099.99$1,099.99 - $1,099.99Current price $1,099.99 -
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 $2,750.00 - Original price $2,750.00Original price$2,750.00$2,750.00 - $2,750.00Current price $2,750.00Takahashi FC-100DF Refractor OTA
TakahashiMore on the way12/26/2024 update Due to overwhelming demand, Takahashi just quoted delivery of March 2025 on this particular model. We will consider any sale ...
View full detailsOriginal price $2,750.00 - Original price $2,750.00Original price$2,750.00$2,750.00 - $2,750.00Current price $2,750.00 -
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 $3,195.00 - Original price $3,195.00Original price$3,195.00$3,195.00 - $3,195.00Current price $3,195.00Astro-Tech AT130EDX f/7 FCD100 ED Triplet APO
Astro-TechIn StockThe AT130EDX is the next evolution of instruments from Astro-Tech. The instrument quality is what you come to expect from an Astro-Tech with an eye...
View full detailsOriginal price $3,195.00 - Original price $3,195.00Original price$3,195.00$3,195.00 - $3,195.00Current price $3,195.00 -
Original price $1,080.00 - Original price $1,080.00Original price$1,080.00$1,080.00 - $1,080.00Current price $1,080.00Sky-Watcher Evostar 80ED 80mm f/7.5 ED Doublet Apochromatic Refractor S11100
Sky-WatcherIn StockThis 80mm Sky-Watcher Evostar 80ED doublet apochromatic refractor is loaded with performance and features at a very attractive price . . . This Sky...
View full detailsOriginal price $1,080.00 - Original price $1,080.00Original price$1,080.00$1,080.00 - $1,080.00Current price $1,080.00 -
Original price $1,395.00 - Original price $1,395.00Original price$1,395.00$1,395.00 - $1,395.00Current price $1,395.00
Astro-Tech 8" f/8 Ritchey-Chrétien Astrograph, Carbon Fiber Tube
Astro-TechSold OutThe Astro-Tech AT8RC is the first affordable 8" Ritchey-Chrétien with premium features available to the amateur astronomer who is into serious deep...
View full detailsOriginal price $1,395.00 - Original price $1,395.00Original price$1,395.00$1,395.00 - $1,395.00Current price $1,395.00Sold out -
Original price $899.00 - Original price $899.00Original price$899.00$899.00 - $899.00Current price $899.00ZWO FF65 APO Refractor OTA
ZWOMore on the wayThe ZWO FF series is a potential fit for your astro-photography needs. The ZWO FF65 APO is a high-performance 65mm f/6.4 astrograph designed for ...
View full detailsOriginal price $899.00 - Original price $899.00Original price$899.00$899.00 - $899.00Current price $899.00
