Field Flattener

Tele Vue's 0.8x focal reducer and field flattener turns the 600-mm f/7 optics of the company's popular 85-mm refractor into a 480-mm f/5.6 system highly corrected for astrophotography with 35-mm film cameras.

Sky & Telescope photo by Craig Michael Utter

Recent Sky & Telescope Test Reports for astronomy-related accessories are available in Adobe Acrobat PDF format from S&T's online store.

Note that product prices and specifications may have changed since the reviews were originally published in the magazine. Please check the advertisements in the current issue of Sky & Telescope, or visit vendors' Web sites, for the most up-to-date product information.

Individual test reports are available for $3.99 per article.

For expert advice on choosing the right accessories for your equipment, see our new SkyWatcher Series video: A Guide to Accessories For Your Telescope.


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