Archived posting to the Leica Users Group, 1998/04/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> To keep it from turning, it takes a lot more "guts" that take up > space and weight in the lens The technical terminology for the apparats that keeps the front group from rotating is a 'double-helical'. A single helicoid lens rotates and is, by design smaller, because it has only one helical. DG