Focuser Boss II Focusing Kit - HSM20 - Dual control board

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

$453.6 ~~$720~~ In stock

This option includes the dual control board, which allows you to control two focusers at the same time.

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.

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.

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 picture below) and all Feather Touch micro 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.

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)

Zoe ★★★★★ Oct 21, 2026

The dual control board made switching between my two focusers effortless during a long imaging session, and the response was immediate on both. The HSM20 is definitely a step up from manually tweaking focus, though the initial wiring took a bit of patience. It's been solid all night, and I'm glad I

Nicholas ★★★★★ Oct 20, 2026

Setting up the dual control board to run both focusers together was surprisingly straightforward, and the sync has been rock-solid during my last few imaging sessions. The HSM20 motors engage with a satisfying precision that makes fine-tuning so much easier.

Henry A. ★★★★★ Oct 19, 2026

I was worried about syncing two focusers, but the dual control board made setup surprisingly straightforward. The HSM20 motors attached cleanly to my Feather Touch pinion, and now I can adjust both focusers from a single point.