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Starlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time

Starlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time

by Starlight Instruments
SKU SI-FB-II 2nd FOCUSER
CA$56.00 - CA$56.00
CA$56.00
CA$56.00 - CA$56.00
CA$56.00
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  • Enables Control of 2 Focusers Simultaneously
  • Designed for the Starlight Instruments Focuser Boss II Controller
  • Streamlines Dual-Telescope and Guidescope Setups
  • Eliminates the Need for a Second Focuser Controller
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  • Description
  • FAQ
  • Downloads
  • Warranty

  • Starlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time

    The Starlight Instruments Circuit Board Upgrade enables your Focuser Boss II to control 2 focusers simultaneously from one hub. This expansion to 2 channels is essential for imagers running a main telescope and a separate, motorized guidescope without adding a second controller.

    Control 2 Focusers from a Single Focuser Boss II Hub

    For advanced astrophotography, particularly with dual-instrument setups, managing two separate focusers can be cumbersome. This circuit board upgrade installs directly into the Starlight Instruments Focuser Boss II hub, unlocking its second focuser port. This allows your ASCOM-compatible software or the Focuser Boss II hand controller to manage both your primary imaging train and a secondary motorized focuser on a guidescope or parallel instrument.

    The result is a streamlined, fully automated system where both optical paths can be focused independently without requiring a second control box, power supply, or USB connection to your computer. Please note that a second stepper motor (such as the HSM20, HSM30, or PDMS) is required to drive the second focuser and must be purchased separately.

  • What is the purpose of the Starlight Instruments 2-Focuser Circuit Board Upgrade?

    This circuit board is an internal upgrade for the Starlight Instruments Focuser Boss II control hub. It activates the second focuser port, allowing you to control two separate motorized focusers from the single controller, which is ideal for complex imaging rigs with a main scope and a guidescope.

    Which controller is this 2-Focuser Circuit Board Upgrade compatible with?

    This upgrade board is designed exclusively for the Starlight Instruments Focuser Boss II electronic focusing system. It will not work with other Starlight Instruments controllers like the EFS or controllers from other manufacturers.

    Do I need anything else to control a second focuser with this upgrade?

    Yes. This product is only the circuit board. To control a second focuser, you must also have a second Starlight Instruments stepper motor (like the HSM or PDMS models) and the necessary cables. The motor is not included with this upgrade board.

    How does this 2-Focuser Upgrade simplify imaging a target like the Rosette Nebula (NGC 2244) with a guidescope?

    When imaging a large target like the Rosette Nebula (NGC 2244), maintaining perfect focus on both your main imaging telescope and your off-axis guider or separate guidescope is critical. This board allows your automation software (like N.I.N.A. or SGP) to run autofocus routines on both optical paths independently from one hub, ensuring both your main stars and guide stars remain perfectly sharp throughout the night.

    Can I use this Starlight Instruments upgrade to control a main focuser and a filter wheel focuser on my Ritchey-Chrétien telescope?

    Absolutely. This is an excellent use case. If you have a motorized focuser on your Ritchey-Chrétien telescope and a second motor on a device that adjusts for filter offsets, the Focuser Boss II with this 2-focuser upgrade can manage both. Your software can be configured to use one channel for primary focus and the second to make precise adjustments when the filter changes.

    Is the installation of this 2-Focuser Circuit Board difficult?

    Installation requires opening the Focuser Boss II controller housing and seating the board onto the main controller. While it is generally straightforward for users comfortable with electronics, it requires care to avoid static discharge and ensure correct placement. Always refer to the official Starlight Instruments Focuser Boss II manual before attempting installation.

  • Starlight Instruments 1-Year Warranty on Electronics