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".
Starlight Thermistor for Temperature Control... for Focuser Boss Digital Kit In the software download there is a step-by-step instructions on setting up and running the Temperature...
The external motor controller (XMC) was designed to expand the focus capabilities of the "Ultimate Powerbox v2" (supports a 2nd focus controller) and adds focus functionality to the "Pocket Powerbox Advance".
Works with bipolar or unpolar stepper motors
Full, half, 1/4 and 1/8 step (microstepping)
Large range of supported stepper motors
Connector for environmental sensor
Protected against undervoltage, overcurrent and overtemperature
Made especially for Ultimate Powerbox v2 and Pocket Powerbox Advance
Focus fast, reliably and accurately your telescope using a stepper or DC motor and this controller.
versatile, you can use your own motor instead of having to use one of PegasusAstro - and using another motor requires (perhaps) another cable, not another controller
PC operation is standard, but manual operation does not even need a separate hand controller
Temperature probe included
Backlash compensation possible via firmware
ASCOM and INDI compliant, but comes with a standalone program for Windows