TCF-Leo Low Profile Focuser


Include Hub
Special Takahashi Epsilon Kits
In Stock: 2

Optec engineers have developed a low profile, yet extremely robust 3-inch focuser for telescope installations where back-focus is at a premium.  With the width of a typical 1-1/4" eyepiece, the TCF-Leo provides a unique focusing solution for the Celestron EdgeHD and other telescopes with limited flange-to-focus distances.  The proven FocusLynx control system operates the TCF-Leo and can be extended to provide control for a second focuser and supports the optional 802.11 WiFi and Hand Control accessories.

The unique shape of the TCF-Leo is designed to fit neatly between the lock and focus knobs of the Celestron EdgeHD C-11 telescope OTA.  With a center-to-edge distance of about 2.2-inches (55mm), the TCF-Leo works exceptionally well with Innovation Foresight's On-Axis Guider, providing clearance for large cameras and filter wheels above either of the flat edges of the TCF-Leo.  Additionally, the TCF-Leo's 3600 receiver fits directly on to the large 3-inch port of the Perseus Instrument Selector for ultra-fine focus of a large format camera. 

The TCF-Leo supports several draw tube options including the Optec 3000 dovetail, a DSI 3.5" receiver, and a 3-inch split clamp for Wynne Correctors. You can select the option that works best for your system.

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)