A good focuser is just as important as the optics. Electronic focus control and precise mechanics are a must, especially for astrophotography. Here you will find a large selection of suitable "hardware".
The rack and pinion focuser is suitable for do-it-yourself construction or improvement of an 8" Newtonian telescope and also accepts correctors with 3" diameter.
Suitable for telescope tubes with 230mm to 250mm diameter
Including 360° rotation and tilting possibility
2" connection and auxiliary thread M82x1 (female) for adapting large correctors for astrophotography
Micro-reduction for precise focusing
The bearing of the extension tube is decoupled from the adjustment via gear drive (rack-and-pinion)
MKIT30---Micro Touch Focusing System - 2 Piece Kit(hub/hand control and motor) for Control of 2.5", 3.0" Feather Touch® and 2.7" Astro-Physics Focuser Micro Touch Focusing System ...