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The Sky-Watcher NOMAD-5 5x Tele-Centric Focal Extender is a high-quality optical accessory with a variety of uses and co...

This adapter has a female T2 thread at the telescope side and a receptacle for 1.25" accessories at the eyepiece side, i...

The premium apochromatic optics yield high contrast, sharp images, virtually free of false color...

Tele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtua...

Tele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtua...

This 1.25” accessory can be used three ways: as a 2X Barlow for visual use, as a prime focus T-adapter, or as a “Barlowe...

Al Nagler's 4-element concept, continues the tradition of full-field sharpness with optimum aberration control. Like lon...