Optical Tube Assemblies
Optical tube assemblies, commonly abbreviated by astronomers as OTAs are simply the tube of the telescope where the optics are internally located. OTAs can be helpful in a situation in which an observer has a compatible mount and doesn't want to buy a whole new telescope with a mount included. Optical Tube Assemblies can come in the form of Maksutov-Cassegrain, Astrographs, Reflectors, Refractors, Schmidt-Cassegrains and many others! With the right mounting connections and range of mount and tripod payload, OTAs are a great choice for changing optical type without changing the mount.
Fork mount set for the Borg 71FL Fluorite Optical Tube with Tripod.... Learn MoreFREE SHIPPINGModel#: 0271S(48 States)
Learn MoreFREE SHIPPINGModel#: B07746(48 States)
Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.... Learn MoreFREE SHIPPINGModel#: S11400(48 States)
Picture yourself sitting in your friend Bill's backyard, with your other colleagues and friends Janice, Frank, Sue and Zeak. All of you have come together to commemorate Earth Hour... Learn MoreFREE SHIPPINGModel#: 1010-60-00(48 States)
The newly designed high definition ED lens in Vixen's ED103S Refractor gives excellent optical performance in a short optical tube for easy handling.... Learn MoreFREE SHIPPINGModel#: 5865(48 States)
Regular Price: $2,199.00
Special Price: $1,595.00
Weighing in at 14.3 lbs this 5.5 inch Vixen telescope is an incredible performer. Deep Sky objects are easily visible and Astro-Imagers looking for a fast instrument with clear aperture will be impressed with the NA140’s performance.
Now with the 2 Speed focuser, flip mirror , 7x50 FinderScope and Tube Rings complete... Learn MoreFREE SHIPPINGModel#: 5868(48 States)
Regular Price: $1,799.00
Special Price: $1,699.00
Sky-Watcher high-performance ED-APO refractors offer premium optical performance for the discriminating amateur astronomer.... Learn MoreFREE SHIPPINGModel#: S11130(48 States)
Complete Includes: Custom soft case, Screw-on lens cover, Sliding dew shield, Plossl eyepiece, 2" focuser, 2" diagonal, 1 1/4" adapter, Ivory Powdercoat finish or Evergreen Powercoat... Learn MoreFREE SHIPPINGModel#: WXC-3063(48 States)