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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 $1,899.00 - Original price $1,899.00Original price$1,899.00$1,899.00 - $1,899.00Current price $1,899.00| /
Astro-Tech AT130 EDT f/7 ED Triplet OTA
Astro-Tech5.0 star rating 45 ReviewsIn Stock5.0 / 5.0
45 Reviews
Some 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 $979.99 - Original price $979.99Original price$979.99$979.99 - $979.99Current price $979.99| /
Explore Scientific AR152 6" f/6.5 Achromatic Doublet Refractor Optical Tube
Explore Scientific4.8 star rating 17 ReviewsMore on the way4.8 / 5.0
17 Reviews
This 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 $479.95 - Original price $479.95Original price$479.95$479.95 - $479.95Current price $479.95| /
Astro-Tech 6" f/9 Ritchey-Chrétien Astrograph
Astro-Tech4.8 star rating 32 ReviewsSold Out4.8 / 5.0
32 Reviews
The exceptional value 6" Astro-Tech Ritchey-Chrétien astrograph is once again available for the serious deep space astrophotographer on a budget . ...
View full detailsOriginal price $479.95 - Original price $479.95Original price$479.95$479.95 - $479.95Current price $479.95| /Sold out -
Original price $4,395.00 - Original price $4,395.00Original price$4,395.00$4,395.00 - $4,395.00Current price $4,395.00| /
Astro-Tech AT152EDT f/8 Triplet APO Refractor OTA
Astro-Tech4.9 star rating 10 ReviewsMore on the way4.9 / 5.0
10 Reviews
The 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 $880.00 - Original price $880.00Original price$880.00$880.00 - $880.00Current price $880.00| /
Sky-Watcher Skymax 150 150mm f/12 Maksutov-Cassegrain Optical Tube S11530
Sky-Watcher5.0 star rating 5 ReviewsIn Stock5.0 / 5.0
5 Reviews
The Sky-Watcher 150mm (5.9") Maksutov-Cassegrain folded optical system is a compact optical powerhouse capable of producing sharp, high contrast im...
View full detailsOriginal price $880.00 - Original price $880.00Original price$880.00$880.00 - $880.00Current price $880.00| / -
Original price $2,995.00 - Original price $2,995.00Original price$2,995.00$2,995.00 - $2,995.00Current price $2,995.00| /
Astro-Tech AT150EDL Refractor OTA FCD-100 and Lanthanum f/8 Doublet with Hard Case
Astro-Tech5.0 star rating 1 ReviewIn Stock5.0 / 5.0
1 Review
The 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 $999.00 - Original price $999.00Original price$999.00$999.00 - $999.00Current price $999.00| /
Celestron 6" f/8 Achromatic Doublet Refractor Optical Tube, CG5/AVX Dovetail
Celestron2.5 star rating 2 ReviewsMore on the way2.5 / 5.0
2 Reviews
Here'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 $3,195.00 - Original price $3,195.00Original price$3,195.00$3,195.00 - $3,195.00Current price $3,195.00| /
Astro-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 $839.95 - Original price $839.95Original price$839.95$839.95 - $839.95Current price $839.95| /
Celestron 6" SCT Optical Tube, CG5/AVX Dovetail
Celestron5.0 star rating 10 ReviewsMore on the way5.0 / 5.0
10 Reviews
This 6" SCT optical tube has advanced Starbright XLT multicoatings for Celestron's brightest images ever. The Celestron C8 was the first Schmidt-Ca...
View full detailsOriginal price $839.95 - Original price $839.95Original price$839.95$839.95 - $839.95Current price $839.95| / -
Original price $2,990.00 - Original price $2,990.00Original price$2,990.00$2,990.00 - $2,990.00Current price $2,990.00| /
Takahashi Epsilon E-130D Astrograph
Takahashi5.0 star rating 1 ReviewMore on the way5.0 / 5.0
1 Review
Wide-field imagers rejoice! The Takahashi Epsilon E-130D telescope is an incredible wide-field imaging machine. The Epsilon series of astrographs ...
View full detailsOriginal price $2,990.00 - Original price $2,990.00Original price$2,990.00$2,990.00 - $2,990.00Current price $2,990.00| / -
Original price $8,250.00 - Original price $8,250.00Original price$8,250.00$8,250.00 - $8,250.00Current price $8,250.00| /
Sky-Watcher Esprit 150mm f/7 Ed Apochromatic Triplet Refractor With Field Flattener S11430
Sky-Watcher5.0 star rating 1 ReviewMore on the way5.0 / 5.0
1 Review
The big Sky-Watcher Esprit 150mm ED apochromatic triplet refractor with thread-on field flattener combines premium high contrast/high resolution im...
View full detailsOriginal price $8,250.00 - Original price $8,250.00Original price$8,250.00$8,250.00 - $8,250.00Current price $8,250.00| / -
Original price $5,999.99 - Original price $5,999.99Original price$5,999.99$5,999.99 - $5,999.99Current price $5,999.99| /
Explore Scientific 140mm f/6.7 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hexagonal Focuser
Explore Scientific3.0 star rating 2 ReviewsSold Out3.0 / 5.0
2 Reviews
140mm has long been considered the perfect size for an APO refractor. Explore Scientific makes that size a reality with fantastic optics and mechan...
View full detailsOriginal price $5,999.99 - Original price $5,999.99Original price$5,999.99$5,999.99 - $5,999.99Current price $5,999.99| /Sold out -
Original price $4,100.00 - Original price $4,100.00Original price$4,100.00$4,100.00 - $4,100.00Current price $4,100.00| /
Sky-Watcher Evostar 150DX 150mm Apochomatic Refractor Optical Tube S11195
Sky-WatcherIn StockThe Sky-Watcher Evostar 150DX is one of the most affordable 6" ED doublet refractors available today with a large format rack and pinion focuser. S...
View full detailsOriginal price $4,100.00 - Original price $4,100.00Original price$4,100.00$4,100.00 - $4,100.00Current price $4,100.00| / -
Original price $4,499.99 - Original price $4,499.99Original price$4,499.99$4,499.99 - $4,499.99Current price $4,499.99| /
Explore Scientific 152mm f/8 FCD-1 ED Triplet Refractor, Carbon Fiber, 2.5" Hex Rack And Pinion Focuser
Explore ScientificIn StockThis big and optically excellent 152mm (6") Explore Scientific air-spaced ED triplet apochromatic refractor has a carbon fiber body and a 2.5" Hex ...
View full detailsOriginal price $4,499.99 - Original price $4,499.99Original price$4,499.99$4,499.99 - $4,499.99Current price $4,499.99| / -
Original price $595.00 - Original price $595.00Original price$595.00$595.00 - $595.00Current price $595.00| /
Sky-Watcher Quattro 150P Imaging Newtonian S11205
Sky-WatcherMore on the waySky-Watcher Quattro 150P Imaging Newtonian Reflector The Sky-Watcher Quattro 150P is a fast, precision-engineered Newtonian reflector designed from...
View full detailsOriginal price $595.00 - Original price $595.00Original price$595.00$595.00 - $595.00Current price $595.00| / -
Original price $848.00 - Original price $848.00Original price$848.00$848.00 - $848.00Current price $848.00| /
iOptron 6" Maksutov Cassegrain Optical Tube
iOptronMore on the wayEnjoy scanning the night skies with this fantastic 6" iOptron Maksutov. The iOptron® Rumak-type 150mm Maksutov-Cassegrain is perfect for the seriou...
View full detailsOriginal price $848.00 - Original price $848.00Original price$848.00$848.00 - $848.00Current price $848.00| /