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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 $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-TechMore on the wayThe 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 $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 $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 $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 $2,750.00 - 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 $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 $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 -
Original price $2,249.99 - Original price $2,249.99Original price$2,249.99$2,249.99 - $2,249.99Current price $2,249.99Explore Scientific 102mm f/7 Carbon Fiber FCD100 ED Triplet Refractor
Explore ScientificIn StockThis 102mm (4") Explore Scientific Carbon Fiber air-spaced ED triplet apochromatic refractor is loaded with quality optical performance at a surpri...
View full detailsOriginal price $2,249.99 - Original price $2,249.99Original price$2,249.99$2,249.99 - $2,249.99Current price $2,249.99 -
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 Evergreen Tube/Black Trim APO Refractor OTA
TeleVueMore on the wayThe TV-85 has a 2" dual-speed rack and pinion focuser with a brass non-marring clamp ring to hold star diagonals and accessories in place. It comes...
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 $1,299.00 - Original price $1,299.00Original price$1,299.00$1,299.00 - $1,299.00Current price $1,299.00Astro-Tech AT86EDQ f/7 Quad Refractor
Astro-TechIn StockThis Astro-Tech AT86EDQ ED refractor has: 86mm f/7 fully multicoated four-lens/two-group refractor two ED lens elements amazing flat field astrop...
View full detailsOriginal price $1,299.00 - Original price $1,299.00Original price$1,299.00$1,299.00 - $1,299.00Current price $1,299.00 -
Original price $1,734.00 - Original price $1,734.00Original price$1,734.00$1,734.00 - $1,734.00Current price $1,734.00TeleVue TV-76 3" (76mm) f/6.3 Ivory Tube/Black Trim APO Refractor OTA
TeleVueIn StockThis TeleVue TV-76 refractor has out of this world optics in a very compact 14.5" long body. It's small enough and light enough to take anywhere wi...
View full detailsOriginal price $1,734.00 - Original price $1,734.00Original price$1,734.00$1,734.00 - $1,734.00Current price $1,734.00 -
Original price $2,236.00 - Original price $2,236.00Original price$2,236.00$2,236.00 - $2,236.00Current price $2,236.00Lunt LS60MT Modular Telescope H-Alpha Pressure Tuned Rack And Pinion Focuser With B600
Lunt Solar SystemsMore on the wayFeaturing Best in Class Resolution and Professional Grade Optics Configuration 4.2mm Image Size >.65a Bandpass (Single Stack) >.45a Bandpass...
View full detailsOriginal price $2,236.00 - Original price $2,236.00Original price$2,236.00$2,236.00 - $2,236.00Current price $2,236.00 -
Original price $2,582.00 - Original price $2,582.00Original price$2,582.00$2,582.00 - $2,582.00Current price $2,582.00Lunt Solar Systems LS60MT Modular Telescope H-Alpha Pressure Tuned 2" Rack And Pinion Focuser With B1200
Lunt Solar SystemsMore on the wayThe B1200 model is the best choice for photography over the B600 4.2mm Image Size >.65a Bandpass (Single Stack) >.45a Bandpass (Double Stack...
View full detailsOriginal price $2,582.00 - Original price $2,582.00Original price$2,582.00$2,582.00 - $2,582.00Current price $2,582.00 -
Original price $1,799.00 - Original price $1,799.00Original price$1,799.00$1,799.00 - $1,799.00Current price $1,799.00Explore Scientific 102mm f/7 Classic White FCD100 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 $1,799.00 - Original price $1,799.00Original price$1,799.00$1,799.00 - $1,799.00Current price $1,799.00 -
Original price $1,499.00 - Original price $1,499.00Original price$1,499.00$1,499.00 - $1,499.00Current price $1,499.00ZWO FF80 APO Refractor OTA
ZWOMore on the wayThe ZWO FF80 APO is a highly refined 80mm f/7.5 quadruplet apochromatic refractor, built from the ground up to deliver uncompromising optical perfo...
View full detailsOriginal price $1,499.00 - Original price $1,499.00Original price$1,499.00$1,499.00 - $1,499.00Current price $1,499.00 -
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 $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 $1,600.00 - Original price $1,600.00Original price$1,600.00$1,600.00 - $1,600.00Current price $1,600.00Takahashi FC-76DCU Refractor Telescope
TakahashiMore on the wayRelive the 80's with this updated version of a Takahashi Classic, the Takahashi FC-76DCU. Like the FS series, the FC series are apochromatic refrac...
View full detailsOriginal price $1,600.00 - Original price $1,600.00Original price$1,600.00$1,600.00 - $1,600.00Current price $1,600.00 -
Original price $1,734.00 - Original price $1,734.00Original price$1,734.00$1,734.00 - $1,734.00Current price $1,734.00TeleVue TV-76 3" (76mm) f/6.3 Evergreen Tube/Black Trim APO Refractor OTA
TeleVueMore on the wayThe TV-76 uses a 3" (76mm) true apochromatic doublet lens using an SD (special dispersion) glass element. Thanks to this special low chromatic disp...
View full detailsOriginal price $1,734.00 - Original price $1,734.00Original price$1,734.00$1,734.00 - $1,734.00Current price $1,734.00 -
Original price $799.00 - Original price $799.00Original price$799.00$799.00 - $799.00Current price $799.00ZWO FF65 APO OTA
ZWOMore on the wayThe ZWO FF series is a potential fit for your astro-photography needs. The ZWO FF65 APO is a flat field astrograph that can be used visually as wel...
View full detailsOriginal price $799.00 - Original price $799.00Original price$799.00$799.00 - $799.00Current price $799.00
