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TCF-S Focuser Downloads

TCF-S, TCF-Si, TCF-S3, and TCF-S3i focusers

TCF-S Focuser Technical Manual:

Model TCF-S Temperature Compensating Focuser Technical Manual for Theory of Operation and Operating Procedures, Revision 11 - August 2010.

Download and print the TCF-S Technical Manual for Theory of Operation and Operating Procedures.

TCF-S Focuser Software installers:

NOTE:  In most cases, the most recent OptecTCF-S_Installer driver is the only driver required for new installations.  Choose the _x86 version installer for 32-bit Windows platforms or the _x64 version installer for 64-bit Windows platforms.   Older program installers can be found still be found here.

TCF-S FocuserOptecTCF-S_Installer_x86(5.3.4).zip
Windows 32-bit  (release date: 03/03/2012)

ASCOM Standards32-bit Installer program for the TCF-S Control Program and ASCOM Driver version 5.3.4.  Driver with advanced setup options for the TCF-S, TCF-Si, TCF-S3 and TCF-S3i focusers.  Includes both standalone program, ASCOM driver, and expanded help file.  NOTE:  You will need to unzip this file into a temporary folder and double-click the *.msi installer program.
ASCOM driver requires Platform 5.5 or later.
TCF-S Firmware v2.40, v4.11 or TCF-Si v3.11 recommended.
Software copyright 2012 - Optec, Inc. (Free to distribute.)

 Download TCF-S ASCOM driver
TCF-S FocuserOptecTCF-S_Installer_x64(5.3.4).zip
Windows 64-bit  (release date: 03/03/2012)

ASCOM Standards64-bit Installer program for the TCF-S Control Program and ASCOM Driver version 5.3.4.  Driver with advanced setup options for the TCF-S, TCF-Si, TCF-S3 and TCF-S3i focusers.  Includes both standalone program, ASCOM driver, and expanded help file.  NOTE:  You will need to unzip this file into a temporary folder and double-click the *.msi installer program.
ASCOM driver requires Platform 5.5 or later.
TCF-S Firmware v2.40, v4.11 or TCF-Si v3.11 recommended.
Software copyright 2012 - Optec, Inc. (Free to distribute.)

 Download TCF-S ASCOM driver

Software Help Files:

View the  TCF-S Help  files.
Read and print the TCF-S Help File pdf.
View the TCF-S ASCOM Driver Help  files.

Older Software and Drivers:

Older TCF-S drivers and software can now be found here.

Known Technical Issues:
USB-to-Serial Converter Issues.
NOTE: If a USB-to-serial converter is needed to interface to an Optec instrument, it is necessary to confirm that the converter is compatible with the Optec control software. Many low cost converters using the Prolific chip set will not work with the Optec control software. We suggest that the converter use the FTDI chip set for best compatibility. The #17690 single port and the #17691 4-port USB-to-serial converter sold by Optec uses the FTDI chip set.