Baader's new Diamond Steeltrack focuser offers a number of improvements over the outgoing model but the the unique 'Diamond form' micro-geared drive system is most noteworthy because it promises zero backlash, zero cogging and zero flexure!
How does it work? Imagine a surface like a fine emery cloth, if you push two of the surfaces together their grits mesh. On a microscopic level thousands of 'teeth' grip each other, like teeth on a rack and pinion. The SteelTrack has a very fine grit made from industrial diamonds applied to what would normally be (on a Crayford focuser) a smooth metal roller bearing, which meshes with a textured metal surface on the focuser drawtube. The result is remarkable, it provides the smooth action of a Crayford with no backlash and a higher load bearing capacity. We hope that makes sense, it is much easier to understand when the focuser is in front of you.