#19700 - TCF-Lynx Robust 2-inch Focuser


In Stock: 6

Following the long tradition of the TCF-S Temperature Compensating Focuser, Optec's TCF-Lynx features a robust 2-inch Crayford-style design for smooth focus.  The updated model is faster and offers greater versatility in the same compact, yet solid, focuser design.

The proven FocusLynx control system is included with every TCF-Lynx and can be expanded to provide control for a second focuser.  The FocusLynx system includes optional 802.11 WiFi and Hand Control accessories.

As a robust Crayford style 2-inch focuser, the TCF-Lynx drawtube accepts any of our 2-inch adapters developed especially for the TCF-S and TCF-Lynx focusers.  The optional 1-1/4" Centering Adapter allows any 1-1/4-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.

Note that this model requires a FocusLynx Controller Hub to function.


Overall Height: 3.3" (84mm) to 3.9" (99mm)
Focuser Travel: 0.6" (15.2mm)
Focuser Midpoint 3.6" (91.4mm)
Total Step Travel:   7,000 steps
Step Resolution:  2.2 microns
Weight:  2lb. 4oz. (1.0 kg)
Payload Capacity: 10-lbs. (4.5 kg)
Telescope-side Mount: OPTEC-2400 dovetail
Camera-Side Mount: 2-inch drawtube
Control System: FocusLynx Controller (included if With Hub selected)


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).
  • TCF-Lynx 2-inch Crayford-style Digital Focuser,
  • FocusLynx Control Hub (included if With Hub selected),
  • Optec USB/Serial communications cable, 6-ft. length (included if With Hub selected),
  • CAT-5e/CAT-6 Ethernet cable, 6-ft. length (x2) (included if With Hub selected),
  • 12VDC 1.25A power supply - 110-240VAC input (included if With Hub selected),
  • UL/CSA compliant wall plug cord (included if With Hub selected),
  • 20-in Temperature Probe (included if With Hub selected),
  • 5/32" ball driver hex tool.