Convertible Refractors: Stellarvue 90-mm Apo Refractors

The SV90TBV fluorite triplet refractor from Stellarvue (from $1,995) sports several features that help set it apart from the multitude of scopes recently entering the market. It’s the only 90-millimeter apochromat made with a three-element objective, which offers a level of color correction not possible with two-element designs. And the f/7 focal ratio makes the scope small enough for grab-and-go portability. But the really nifty feature is the removable tube section that allows the scope to work with binoviewers without additional optics that increase the scope’s focal length (and thus reduce the field of view). If that doesn’t interest you, then you can save $200 and order the SV90T without the convertible tube. Like all Stellarvue refractors, these new scopes are individually star-tested by company founder Vic Maris.

Contact: Stellarvue, 11820 Kemper Rd., Auburn, CA 95603; 530-823-7796;

Every year the editors of Sky & Telescope present their selection of the most intriguing new products to enter the marketplace. "Hot New Products for 2007" appeared in the January 2007 issue, page 100. For further information about a specific product, contact the manufacturer or distributor. To alert the editors of Sky & Telescope to the introduction of a new product, please send e-mail to

All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.


This site uses Akismet to reduce spam. Learn how your comment data is processed.