The Astro-Photography Mailing List ------------------------------------ Having a lx200, I know all about a worm gear, but can someone breifly describe for me the radial dec corrector and the tangent arm which I have seen references to? Bobby Middleton astropics at: http://home.unicomp.net/~bobbym/astro1.htm > > that Losmandy no longer makes a radial arm dec corrector. >