Telescope Optical Tube Assemblies
If you're looking for an exceptional telescope for astrophotography that won't cost you big bucks, then check out this affordable alternative. We've optimized the optics of our popular short-focal-length Orion StarBlast 4.5 Imaging Reflector Optical Tube to give a fully illuminated field of view with the Orion StarShoot Deep-Space Imager and similar small-chip astronomical charge coupled device (CCD) cameras.
The popular "little scope that could" is now even better. The wide-field refractor that novices appreciate for its ease of use and big-scope owners value as a take-anywhere second scope now has fully multi-coated optics and comes with its own padded carrying case.
77mm Achromat Objective Assembly.
Orion 100mm f.6.0 Refractor OTA. This versatile refractor features a 100mm (3.9") achromatic lens of 600mm focal length (f/6.0) set inside a baffled optical tube. The optics are multi-coated for excellent light transmission. The objective lens is held in an adjustable aluminum cell and shaded by an aluminum dew shield.
This optical tube assembly includes parabolic mirror optics, center marked for easy collimation. It has an upgraded 2" Crayford-style focuser (with 1.25" eyepiece adapter), quick-collimation cap, dust cap, and a dovetail base that accommodates any Orion finder scope.
70 mm f/6.0 doublet refractor made with a hand figured, extra low dispersion Stellarvue doublet lens providing excellent color correction and extreme contrast. This optic will impress you! Features a 2" dual speed Crayford focuser, fully rotating with 1.25" adapter, and a retracting dew shield. Only 4 1/2 lbs. and 12" long (with dew shield retracted). The perfect travel scope!
If your astrophoto aspirations go beyond our 4.5" Imaging Reflector, step up to this 6" model. Its performance compares head-to-head with many high-end refractors, but at a fraction of the price.
Carbon Fiber version of the SV70ED. 70 mm f/6.0 doublet refractor made with a hand figured, extra low dispersion Stellarvue doublet lens providing excellent color correction and extreme contrast.
Its fully multi-coated 80mm objective doublet contains one element crafted from FPL-53 extra-low dispersion 'ED' optical glass. Images are virtually free of chromatic aberration! With a focal length of 600mm (f/7.5), this is wonderfully suited for visual applications on both solar system and deep-sky objects as well as for prime-focus astrophotography and CCD imaging.
Responding to your requests, we are pleased to offer the Orioin 254mm f/4.7 Reflector Telescope Optical Tube assembly (OTA) for folks who already have an equatorial mount. This optical tube assembly includes Pyrex parabolic mirror optics, upgraded 2" Crayford-style focuser, telescope eyepiece holder, quick-collimation cap, dust cap, and dovetail base for finder scope.
The SV80ED with hand figured, extra low dispersion doublet for sharp high contrast views. See why so many users rave about its performance.
We have combined the venerable 80mm ED doublet optic with our new carbon fiber tube and produced our lightest ED telescope ever. The SVR80ED Raptor has quickly become our most popular 80mm telescope offering the lightest weight, sharpest doublet optics and smoothest dual speed focuser.
The Orion 150mm Maksutov-Cassegrain Telescope Optical Tube opens up new vistas of the celestial landscape for your viewing pleasure. The 150mm-diameter Maksutov-Cassegrain optics take in 40% more light than their 127mm counterparts, which means this big Maksutov will resolve finer detail in lunar and planetary subjects and permit exploration of a wider array of deep-sky objects.
77EDII Objective Assembly.
The "ED100" delivers images remarkably free of chromatic aberration, thanks to its fully multi-coated 100mm objective doublet. It's crafted with one element of FPL-53 extra-low dispersion "ED" optical glass from Japan. The 100mm aperture gives it 56% greater light grasp than our ED80. And the 900mm focal length (f/9.0) is ideal for visual planetary and lunar study and excels for imaging work as well.
If you were asked to describe the ideal telescope for amateur astrophotography, one that offered unparalleled performance wrapped in a compact design at an affordable price, your description would likely match our new 6" f/9 Ritchey-Chretien Astrograph.
Tele Vue 60 APO Telescope / Spotting Scope. OTA only 10”-long — includes 2-stage 1.25" focuser with quick-focus drawtube plus fine-focus helical. Exquisitely machined and anodized all-metal construction with sliding captive dew shield.
As with all other FS refractors the FS-60CB has its hard multi-coated fluorite objective up front with a low dispersion hard multicoated rear element. This compact short focus [f/5.9 - 355mm] APO refractor is the perfect eclipse telescope and with its triplet reducer [f/4.4 - 264mm] is a great little astro camera or spotting scope.
We have combined the venerable 80mm ED doublet optic with our new carbon fiber tube and produced our lightest ED telescope ever. The SVR80ED Raptor has quickly become our most popular 80mm telescope offering the lightest weight, sharpest doublet optics and smoothest dual speed focuser. The SVR80ED-2 comes with a Feather Touch reverse Crayford focuser.