SI-EFS---Electronic Focusing System only (no motor)
SI-EFS---Electronic Focusing System only (no motor)

Starlight Instruments

SI-EFS---Electronic Focusing System only (no motor)

Regular price
$ 300.00
Sale price
$ 300.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


Starlight Instruments is proud to release its new Electronic Focusing System (EFS), this is the next step in stepper controllers.   The EFS works through any ASCOM compliant software.

EFS Users manual

EFS Review


This system comes standard with the digital hub, hand controller.   The motors are and option and can be selected from the drop down menu.

The control box and hand control are lightweight and compact.

The control box is 4.13" (105mm) long, 2.87" (73mm) wide and 1.1" (28mm) thick.

The EFS system draws a maximum 1 amp of power @ 12V

The EFS can be controlled by standard USB cable

The motors connect to the EFS control hub via Ethernet cable and the hand controller is connected to the EFS control hub via RJ11 cable.

The hand controller has an innovative feature in that you can change the number of steps the focuser moves from 1 step, 10 step, or 100 step increments.  This is done by pressing the knob on the hand controller.  Each step speed has an LED light mode, RED 1 step, Amber 10 step, 100 Green step.

All cables are supplied with the EFS

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.