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".
MKIT30---Micro Touch Focusing System - 2 Piece Kit(hub/hand control and motor) for Control of 3.5" Feather Touch and 4.0" Astro-Physics Focusers Micro Touch Focusing System
MKIT20---Micro Touch Focusing System - 2 Piece Kit(hub/hand control and motor) for Control of 2.0", MPA Retrofits, and Micro Feather Touch Focusers - WIRED -
ESATTO 3" is the robotic microfocuser perfect for many telescopes like large refractors, Ritchey-Chrétiens or Cassegrains, specifically designed for astrophotography.
Crayford style focuser with 28 ball bearings
Specially designed for very high load capacity (up to 8 kg) with no flexure
Low profile design with only 77 mm thickness
25 mm focuser travel with an incredible resolution of 0.04 microns per step!
Special adapters available to easily connect to many different telescopes
Remotely controlled from EAGLE or any Windows computer, with dedicated control software or ASCOM drivers
USB-C connector offering greater reliability and can be connected to any USB type port thanks to the included cable
Remote control with WiFi from any smartphone, tablet or computer and ESATTO Virtual HandPad app also for visual use!
Many camera threaded adapters available with stop ring on the camera side to rotate and keep the camera in the optical axis
ARCO port to easily connect the ARCO camera rotator to the ESATTO without the need for additional data or power cables
The Prodigy Microfocuser is a robust 3" motorised focuser that allows you to precisely adjust and remotely control the focus of your telescope equipment.