Optical Tube Assemblies

Easily the best value for money 7" Mak available.

Sky-Watcher Skymax-90T, 90mm 3.5inch f/1250 Maksutov-Cassegrain Optical tube Assembly

102mm 4inch f/1300 Maksutov-Cassegrain Telescope. The Sky-Watcher SKYMAX Maksutov-Cassegrains are the ultimate ‘take-anywhere’ telescopes. They are also ideal if working space is limited.

Very popular telescope for image quality & compactness. Can be bought with a good video tripod Alt-Az or EQ such as SWs EQ3-2

C8 Optical Tube Assembly as used in the best selling Celestron Evolution 8. Sold without eyepiece, visual back or finderscope. Ideal if you have a damaged telescope or want to upgrade to the "magic" 8 inch aperture.

C8 Optical Tube Assembly as used in the best selling Celestron Nexstar 8se. Sold without eyepiece, visual back or finderscope. Ideal replacing a damaged telescope or want to upgrade to the magic 8 inch aperture.

The tripod socket on this OTA makes it ideal for terrestrial use as well.

With a total weight of 28 lbs including the tripod, the ultra portable 5 SE features a precision optical system with 1,250 mm focal length (f/10) standard with our premium StarBright XLT coatings and offers 56% more light gathering power than a 4" model.

You get what is seen in the image - no mount, finderscope or eyepiece

Used - In VGC+ & the optics are clean. Can be mounted on a photo tripiod for terrestrial observation.

You get what is seen in the image - no mount, finderscope or eyepiece

Spare Part Optical tube only of telescope. Fitted with Advanced/Vixen Dovetail with standard tripod socket socket. A great little telescope on a tripod or most astronomy mounts

Perfect if you have damaged a Nexstar telescope's optical tube:
SLT grey (Right), Astro-Fi black (Right), Evolution silver (Left) SE orange (Left)
Construction & StarBright multi-coated optics are identical in all

The dovetail position (in brackets) will alter the position of the focuser
An EQ mounted focuser is different again

Supplied without mount, tripod, finderscope, visual back, diagonal or eyepieces

Perfect if you have damaged a Nexstar telescope's optical tube:
SLT grey (Right), Astro-Fi black (Right), Evolution silver (Left) SE orange (Left)
Construction & StarBright multi-coated optics are identical in all

The dovetail position (in brackets) will alter the position of the focuser
An EQ mounted focuser is different again

Supplied without mount, tripod, finderscope, visual back, diagonal or eyepieces

91012 The 7"/180mm aperture Maksutov-Cassegrain (or Mak for short) is a specialised instrument designed for detailed, high contrast views that sets a new standard in mid-level telescopes. With its Maksutov-Cassegrain optical tube the telescope provides unparalleled views of the planets and up-close views of the lunar surface, including craters and maria.

All optical surfaces are coated with Celestron’s high efficiency StarBright® multi-layered coating group

EdgeHD is an aplanatic Schmidt telescope designed to produce aberration-free images across a wide visual and photographic field of view

Celestron Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually for use with your favorite mount