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VLC T-thread Mount for NextGEN/Lepus

NEW!  VLC - Variable Length Camera Adapters

#19390  - Designed for use with Lepus and NextGEN Telecompressors

The Optec #19390 Variable Length Camera adapter makes setting your camera at the perfect back-focus distance quick and simple. With an OPTEC-2100 base to fit the Lepus or NextGEN telecompressor and T-thread camera interface, The #19390 VLC can set the back-focus from 25 to 42mm. Refer to the back-focus diagram for your NextGEN or Lepus telecompressor lens to determine the optimal back-focus distance.

Each VLC adapter has a precision engraved scale showing the distance in millimeters from the T-thread or STL-thread seat to the base of the adapter.  When calculating the back-focus distance for your telecompressor and camera setup, use the engraved scale to set the correct distance remaining after subracting for the camera sensor depth, filter wheel thickness, OAG thickness, etc.  With the included locking ring, sub-millimeter precision can be achieved for setting the camera back-focus to telecompressor distance exactly at the optimum location. 

Other VLC Adapter Models:

Available in four models, the VLC adapters are available with T-thread or STL 2.156"x24tpi thread used in many SBIG, QSI and other cameras.  VLC adapters are available to fit the 2.1-inch OPTEC-2100 dovetail on the Lepus or NextGEN telescompressors, or the male STL thread on the camera side of the #19405 Lepus-STL and NGC214 model telecompressors.  These Variable Length Camera adapters can be used in place of the fixed length NextGEN and Lepus camera mounting plates, or in combination with the T-thread extenders available from Optec or many other manufacturers.

  • #19393: VLC STL thread camera adapter for NextGEN and Lepus telecompressors. Click here for details or to order.
  • #19395: VLC T-thread camera adapter for NGC and Lepus-STL telecompressors. Click here for details or to order.
  • #19397: VLC STL thread camera adapter for NGC and Lepus-STL telecompressors. Click here for details or to order.
How to Order:

Contact any Optec dealer, call Toll-Free 1-888-488-0381, email, or visit our ecommerce site: optecinc.us.

Variable Length Camera Adapter Instructions:

Lepus VLC Step-by-Step Installation and Usage Instructions.


Feel free to call or email Optec Sales with any questions regarding back-focus, camera mounts, and telecompressor performance in general.