MoonLite Single rate CR1 focusers at $165 have the smoothest action of any single rate focuser. All draw tube surfaces are polished to a mirror shine presenting a flawless surface for the bearings and shaft to ride against. So smooth you would think it's a dual rate focuser.
The CR2 dual rate is even better-- It uses a 8.2 to 1 inline planetary all ball bearing reduction unit. There are only 2 high end crayford focusers using such units -Our Moonlite CR2 at $265 and Feather Touch at $340. You do the math---
We go one step even better. Our filter swing option allows your favorite 2" filter to swing in and out with an above board lever built right into the focuser. This is a great option for UHC/O3 nuts.
Just let your filter installed in your focuser at all times, It really is that easy. See URL for On-Line ordering.