Focuser Boss II Focusing Kit - HSM20 - Single control board

Focuser Boss II Focusing Kit - HSM20 - Single control board - View 3

$448.8 ~~$660~~ In stock

The HSM/MSM20 will fit any Feather Touch Micro Focuser, Feather Touch retrofit pinion assembly upgrade, or 2.0" Feather Touch Crayford focuser.

Starlight Instruments is proud to release its new Electronic Focusing System. The Focuser Boss II digital kit works through any ASCOM compliant software, such as Maxim DL, FocusMax, SG Pro, and CCD Soft.

The Focuser Boss IS compatible with a Mac through Sky X with a daily build 7315 or later.

The WIFI option allows you to control the focuser via Smart phone or IPAD. Your phone can be used to control the focuser and the hand controller is not needed unless you want to use both a Smart phone and Hand Controller

The push buttons on the Hand Controller can be used to move the focuser in or out.

The Temperature Sensor is built in, allowing for temperature compensation.

Compatible with most Modern TeleVue Telescopes (see pictures below), and micro touch focusers.

Older Tele Vue focusers with the original mounting bracket (pictured below) are not compatible with Feather Touch.

Modern Tele Vue Focusers that ARE compatible with Feather Touch upgrades have a mounting bracket like the one pictured below.

This system comes standard with a digital hub and stepper motor and allows you to upgrade to the options listed in the drop down boxes.

Focuser Boss II Installation Setup Instructions

Focuser Boss II Software

USB-to-Serial Converter Driver Download

CCDSoft Instructions

Focuser Boss II Firmware update instructions

Handy Motor Installation Instructions

Photo of installed Handy Motor

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Henry ★★★★★ Oct 21, 2026

Replaced the old manual knob on my Feather Touch Crayford and the HSM20 control board made fine focusing so much smoother. Setup was straightforward, just plugged in and calibrated in a few minutes.

Henry H. ★★★★★ Oct 20, 2026

Installed on my 2.0” Crayford and the single control board made wiring a breeze. The HSM20 motor engages smoothly with zero backlash, and it tracks focus perfectly through a full imaging session.

John ★★★★★ Oct 19, 2026

Finally got this installed on my Feather Touch focuser and the stepper motor moves so smoothly that focusing at high magnification is no longer a struggle. The single control board design kept the wiring clean and simple.