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Additional Info
The SV90TBV2 telescope features our 90mm f-7 (630 mm focal length) apo triplet objective lens. This is a top rated visual and photographic instrument, as the many images posted on the internet can attest to. The 2" Feather Touch focuser provides exceptional visual and photographic performance. This telescope is well suited for astro-photography using most cameras with chips that are APS sized or smaller.
Fully multicoated FPL53 objective: The six accurately figured lens surfaces each have extreme broadband coatings giving high contrast for the most vivid stars and the darkest of skies. These coatings transmit light above and below the visual spectrum, which is important to minimize reflections seen on ccd images.
Powdercoated and polished aluminum tube and dew shield: The precision two part aluminum tube and dew shield are cnc machined and powdercoated in our INstrument White finish. The tube and black anodized aluminum fittings look extremely sharp. When the telescope is used, this dew shield may be extended to minimize dewing of the objective at night and to serve as a glare shade during the daytime. When being stored, the dew shield retracts to reduce the length of the telescope.
Internal tube treatment: The main tube interior is painted "ultra flat" black inside and is baffled to eliminate excess light reflection. The 11 baffle ridges of the focuser drawtube are painted "ultra flat" black to eliminate the most common type of reflections. This treatment is far better than draw tubes that are merely threaded. The blackened edges of the objective are the final method used to preserve the outstanding contrast of this exceptional Fluorite lens.
2" Feather Touch dual speed focuser: The 2" Feather Touch offers 2.5" of travel. This focuser is perfect for visual and imaging use with most cameras on the market (using APS or smaller sized chips). The Feather Touch features an ultra-smooth coarse/fine focus knobs (10:1 Ratio), an internal brake system, and an ultra-low backlash system. Don't compromise, get the best.
Machined aluminum clamshell mounting ring with Vixen Dovetail: The SV90TBV uses our unique, American made, precision CNC (computer numeric controlled) machined aluminum mounting ring. This clamshell ring has several 10-32 threaded holes on the side and top accommodating finder scopes, guide scopes, or other accessories. Our clamshell is precision machined and has an "easy-one-touch" single knurled knob for tighten and loosening the ring. This permits faster and more convenient balancing of the telescope tube. The underside of the mounting ring has a Vixen style dovetail rail with safety grooves. This rail fits most telescope mounts on the market such as the Vixen, Celestron CG5 or Meade LXD-55. If you plan to mount this telescope on a larger mount that uses the Losmandy rail, our TP6 (Losmandy sized) plate attaches to the bottom of the Vixen rail with two screws.
Supplied accessories: The SV90TBV comes with our C7 side reinforced, foam lined, airline carry on case. This case will hold the telescope, star diagonal, reflex finder and numerous eyepieces. In addition to the supplied accessories, you will need a star diagonal or erecting prism, eyepiece(s) and a mount. You may also want to purchase a reflex or optical finder scope
Light gathering and magnification power: The purpose of a telescope is to gather light and magnify the apparent size of the object being viewed. A 90 mm refractor gathers 165 times the amount of light the naked eye can to reveal faint objects in space. Magnification power (the increase in relative size of the object being viewed) is dependent upon the eyepiece being used. Different eyepieces provide different magnification powers. Since this telescope uses a highly accurate, hand figured objective lens tested three times in the USA, providing sharper details when viewing at higher powers. These telescopes are free of the coma and astigmatism seen in many import telescopes. Dawes limit states that the maximum power for telescopes under good conditions is about 213 powers for a 90 mm telescope. Check the Recommended Accessories section to make the best choice for eyepieces.
Two year warranty and Stellarvue Service: Stellarvue telescopes and accessories are covered by a two year warranty. But it does not stop there. Since we are a telescope maker, we can repair your telescope for a nominal fee years after it goes out of warranty, should you accidentally drop it on concrete or otherwise damage it. Buy a Stellarvue Telescope with confidence. Our customer care is legendary.
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