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Additional Info
The Stellarvue SVR90T-AP Raptor is a very lightweight 90 mm apo triplet telescope. Using a structurally stable carbon fiber tube and dew shield, this telescope weighs less than some 80mm telescopes! The SVR90T-AP features our proven 90mm f-7 (630 mm focal length) objective lens with an Ohara FPL53 center element. This is a highly rated visual and photographic instrument. This telescope is well suited for both visual work and astrophotography using one of two dedicated field flatteners.
Fully multicoated apo triplet objective: The high Strehl, apochromatic triplet objective provides extremely high contrast. To further enhance this high level of contrast, extreme broadband multicoatings are used on all six air-to-glass surfaces. This boosts contrast, making the stars appear vivid and the background velvet black. These coatings transmit light above and below the visual spectrum. This is important to minimize reflections seen on ccd images.
Carbon fiber tube and dew shield: The tube and dew shield are made of carbon fiber to reduce weight and increase the telescope's good looks. The carbon fiber dew shield has black anodized aluminum end rings. The dew shield and it retracts further reducing the length of the telescope when being stored. 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.
Internal tube treatment: The main tube interior is lined with black velvet and is properly baffled to eliminate any tube wall reflections. Most of the reflected glare seen in small refractors comes from the inside of the focuser drawtube. To eliminate drawtube reflections the tube is painted ultra flat black and textured. Reflections in the optical path are further reduced using edge blackened objective elements.
2.5" Stellarvue visual/photographic focuser: Many years in the making, our new smooth and stable dual speed, 2.5” focuser provides a full 3.2" of travel. This focuser is perfect for visual use and imaging. The rear of the drawtube is threaded to accept our new dedicated SFF7-25 photographic field flattener for most cameras and we will soon introduce a larger chip flattener for cameras with big chips. The focuser comes with two compression ring eyepiece adapters that are 2” and 1.25” resepctively. The Stellarvue focuser is a heavy duty rack and pinion unit designed to carry a higher capacity. It has an ultra-smooth (10:1 Ratio) fine focus control to attain perfect focus every time. An internal brake system allows the user to adjust capacity. The focuser is fully rotating with a wide groove for smooth and precise rotation. All of the features add up to one of the finest dual speed focusers available today.
Machined aluminum hingfed mounting rings. The telescope comes with our R90set hinged rings. The rings have five 1/4-20 holes top and bottom that include a center hole and two sets of holes spaced 1.5” and 60 mm apart. If your mount requires either a Losmandy or Vixen style rail, these are available separately. Use the TP6 for Losmandy system and the TP10 for the Vixen system.
Supplied accessories: The SVR90T Raptor 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 of the naked eye. This will reveal faint objects in space. Magnification power (the increase in relative size of the object being viewed) is dependant upon the eyepiece being used. Different eyepieces provide different magnification powers. Since this telescope uses a highly accurate, hand figured objective lens and is triple tested in the USA, these telescopes are free of coma and astigmatism seen in many import telescopes. This provides sharper details when viewing at higher powers. Dawes limit, which is the stated maximum power for telescopes under good conditions is about 213 power 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. Buy a Stellarvue with confidence. Our customer care is legendary.
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