Low-Profile Design: Engineers at Optec have developed a low-profile 3-inch focuser, perfect for telescope installations where back-focus space is limited.
Compatibility: The TCF-Leo is designed to provide a unique focusing solution for telescopes like the Celestron EdgeHD and others with restricted flange-to-focus distances.
Compact Width: With a width similar to a typical 1-1/4" eyepiece, the TCF-Leo is an excellent choice for telescopes with limited space.
Focus Control: The TCF-Leo is controlled by the proven FocusLynx control system, which can be extended to manage a second focuser and supports optional 802.11 WiFi and Hand Control accessories.
Integration with Celestron EdgeHD: The unique shape of the TCF-Leo is specifically designed to fit between the lock and focus knobs of the Celestron EdgeHD C-11 telescope OTA.
Clearance for Accessories: With a center-to-edge distance of about 2.2 inches (55mm), the TCF-Leo works well with Innovation Foresight's On-Axis Guider, providing clearance for large cameras and filter wheels on either flat edge.
Compatibility with Perseus Instrument Selector: The TCF-Leo's 3600 receiver is directly compatible with the large 3-inch port of the Perseus Instrument Selector, allowing for ultra-fine focus adjustments when using large format cameras.
Draw Tube Options: The TCF-Leo supports various draw tube options, including the Optec 3000 dovetail, a DSI 3.5" receiver, and a 3-inch split clamp for Wynne Correctors. You can choose the option that best suits your telescope system.

The Optec Inc. TCF-Leo Low-Profile Focuser is a versatile and compact solution for telescopes with limited back-focus space, offering precise control and compatibility with a range of accessories and telescopes.

Specifications

TCF-Leo Specifications

Overall Thickness: 1.25" (31.8mm) to 1.6" (40.6mm)
Focuser Travel: 0.35" (8.9mm)
Focuser Midpoint: 1.425" (36.2mm)
Total Step Travel: 112,000 steps
Step Resolution: 0.08 microns
Weight: 1lb. 14 oz. (0.85 kg)
Payload Capacity: 20-lbs. (9 kg)
Telescope-side Mount: OPTEC-3600 dovetail
Control System: FocusLynx Controller (included if option selected)

Camera-Side Mount (based on selected option):

OPTEC-3000 3-inch drawtube (Default)
OPTEC-3000 3-inch drawtube (Extended Height)
DSI 3.5" receiver
3-inch split clamp for Wynne Correctors

FocusLynx Controller Specifications

Stepper Motor Control: bipolar and unipolar stepper motors,
PC Connectivity: USB/Serial, Ethernet, or optional 802.11 WiFi,
Hand Control: Optional 2-button with Digital Read-Out,
WiFi Connection: Optional 802.11b/g compatible,
Second Stepper: Optional plug-in daughter board,
Input Power: 12VDC univeral power supply (110 to 230VAC input),
Alternative Power: Field battery voltage (13.8VDC) with optional automotive cigarette lighter plug,
Software Drivers: ASCOM local server, X2 native drivers for TheSky X

FocusLynx Port Connections:

Focuser 1: RJ45 socket for standard Cat-5e/Cat-6 to focuser,
Focuser 2: Optional second stepper board for RJ45 socket,
Power: 12VDC input, 2.5 x 5.5mm plug, center pin positive,
Network: Standard RJ45 Ethernet socket,
Hand Controller: RJ22 socket for standard telephone handset cord,
Serial: RJ12 socket for Optec USB/Serial cable.
TCF-Leo Low Profile Focuser,
FocusLynx Control Hub (if hub option selected),
Optec USB/Serial communications cable, 6-ft. length (if hub option selected),
CAT-5e/CAT-6 Ethernet cable, 6-ft. length (if hub option selected),
12VDC 1.25A power supply - 110-240VAC input (if hub option selected),
UL/CSA compliant wall plug cord (if hub option selected)

Specifications

TCF-Leo Specifications

Camera-Side Mount (based on selected option):

FocusLynx Controller Specifications

FocusLynx Port Connections:

Software and Docs

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Optec Inc. TCF-Leo Low-Profile Focuser

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