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.
This green optical tube from Astro-Tech is a piece of equipment every advanced serious astronomer should consider. With high quality refractive optics, fabulous accessories, it is pretty amazing. Some of the key features of this item include the dual speed rotating focuser (10:1 ratio focusing) and high quality ED optics great at preventing chromatic aberration. This scope is so high key, Astronomy magazine designated it previous version a “a great grab-and-go scope, a fine little astrograph, a super-finder scope, and a daytime spotting scope.”. Now, Astro-Tech has added even more to the picture.... Learn MoreFREE SHIPPINGModel#: AT72GR(48 States)