If you have a single-speed SkyWatcher Crayford focuser and want even more precise focusing, the Lacerta 1:10 microfocus eyepiece is an excellent solution.
Can be fitted to any SkyWatcher lens or mirror telescopes, as long as they have a Crayford focuser. Thanks to its outstanding precision design, it is even smoother than the factory two-speed focusers! And the extras don't stop there: the microfocusing upgrade can be adjusted for perfect precision in all conditions.