We manufacture extreem crayford focusers for the most demanding user.
They feature perfect machined surfaces made out of solid 6061 aluminum alloy cut on state of the art CNC machines. They are then polished to a mirror like surface and over anodized for hardness. This is why a Moonlite focuser has that butter smooth feel. It's the fine polish that we put on all bearing riding surfaces. The dual rate model uses a 8.2 to 1 ration reduction unit based on a "inline planetary all bearing drive". This is the best reduction unit made to day and only 2 Focuser brands use it ours and one other. Don't be fooled by the motor driven crayfords. They simple don't stack up against a good inline planetary reduction focuser. See URL for on-line ordering.