Optec TCF-Leo Low-Profile Focuser
Optec engineers have developed a new, 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 is included with every TCF-Leo and can be expanded to provide control for a second focuser. The FocusLynx system includes 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.
For owners of the EdgeHD Celestron C1400telescopes, Optec offers a set of replacement knobs for the original lock knobs which provide clearance for the TCF-Leo. Our #19792 Sure-Lock Mirror Support Clutch upgrade includes two brass replacement lock knobs that are easily installed without tools. With standard Optec interfaces on both telescope and camera sides, nearly any telescope imaging system can be configured. Specify any of our OPTEC-3600 telescope mounts or contact Precise Parts for a custom adapter to fit any telescope.
As a full 3-inch focuser, the TCF-Leo drawtube accepts any of our OPTEC-3000 adapters developed for the TCF-S3 and TCF-Lynx3 heavy duty focusers. The optional Precision Centering Adapter allows any large 2-inch diagonal or eyepiece to be added behind the focuser. Visual users will appreciate the FocusLynx Hand Controller with fine-focus rotary knob for no-touch operation of the telescope focus.
Additional Features:
The TCF-LEO is the newest in our line of temperature compensating focusers. This thin low-profile focuser has a minimum thickness of only 1.25″ and 0.35-inches of travel or about 9mm.
We anticipate the TCF-LEO will help many imagers struggling with minimal back-focus on scopes such as the Celestron EdgeHD C1100. TCF-LEO is designed to fit between the mirror lock-knobs on the C-11HD and will work well with the Innovation Foresight On-Axis Guider as well as the large Perseus 3-inch port.
Technical 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
- Camera-Side Mount: OPTEC-3000 3-inch drawtube
- Control System: FocusLynx Controller (included)
FocusLynx Controller Specifications
Functional Specifications:
- Stepper Motor Control: bipolar and unipolar stepper motors,
- Resolution: 16-bit controller with 65,535 step range per focuser,
- 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 (included).
In the Box
TCF-Leo Low Profile Focuser,
FocusLynx Control Hub,
Precision temperature probe,
Optec USB/Serial communications cable, 6-ft. length,
CAT-5e/CAT-6 Ethernet cable, 6-ft. length,
12VDC 1.25A power supply – 110-240VAC input,
UL/CSA compliant wall plug cord
5/64” T-handle hex key tool.
Manuals & Warranty
Optec 1-Year Warranty
Optec TCF-Leo Installation Manual
FocusLynx Software Quick Start Guide
Optec TCF-Leo Mechanical Drawing
