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Among our bestselling optical assemblies are Schmidt-Cassegrains like the Celestron C6-A-XLT. This unit has a 6-inch aperture and features StarBright XLT coatings on all its optical surfaces. If you’re already using any of the CG-5 series, it comes equipped with the same dovetail mounting bar to ensure compatibility.

OTA stands for Optical Tube Assembly. This type of configuration is a standalone tube without an attached mount or tripod, which allows for highly configurable and customizable systems. Usually, people buy OTAs to add to an existing system or to help achieve a certain customized goal.

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No rainchecks will be issued for items out of stock at OPTcorp.com to match a competitor's price. We do not price match competitors if they are out of stock.

Optical tube assemblies are perfect for astronomers and astrophotographers who want to create their own devices and hone in on specific capabilities. Our Sales Team is here to answer any questions and help you achieve that goal on budget and without hassle.

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Oceanside Photo & Telescope wants our customers to shop with confidence knowing that you will always get the best deal available. We will match any online price that we confirm as valid. Details:

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Optical tube assemblies (OTAs) are simply the tube of the telescope where the optics are housed. Shop OPT's wide selection of OTAs below!

The item must be the identical item, brand name, size, weight, color, quantity and model number. It must be in stock at the time of Price Match for us to make a guarantee.

When it comes to upgrading, adding to, or designing your own telescope system, a few options give you more flexibility than an optical tube assembly (OTA). At OPT, we carry a comprehensive selection of OTAs to help you complement your existing system or fully customize the astro-rig of your dreams. You may want to gain a new field of view or upgrade your aperture and optics. No matter what your goals are, our OTAs from trusted brands like Celestron, Lunt Solar, Meade, Orion, and others are everything you need.

Optical tube assemblies (OTAs) are simply the tube of the telescope where the optics are housed. Shop OPT's wide selection of OTAs below!

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The price for an item/offer must be listed and valid at the time of match. We reserve the right to verify a competitor's advertised price and the availability of the item.

Alternately, the PlanetWave CDK 17” offers a higher-budget assembly that significantly exceeds the capabilities of most other designs. This Corrected Dall-Kirkham features a fused silica mirror that keeps RMS spot sizes smaller than a single pixel at the edge of the frame. It eliminates the problems of coma, field curvature, and off-axis astigmatism. This flat-field OTA telescope features a lens group, an ellipsoidal primary mirror, and a spherical secondary mirror to give you all the power you need to take your astronomy and astrophotography to the next level.

Optical tube assemblies (OTAs) are simply the tube of the telescope where the optics are housed. OTAs are a great option if you already own a telescope mount and want a new field of view. Click the Learn More Button to read more!

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