The S2341 provides rear focusing for the TCS20 by moving the camera body or digital-back side of the assembly. The lens-side standard can be freely repositioned on the rail and then locked.
Rear-side focus adjustment
Moving the rear standard changes the lens-to-image-plane distance while the lens-side assembly remains in its selected position. This arrangement is useful when the lens position should remain fixed during focusing.
Reading the focusing scale
The documented dial increment is 0.04 mm of travel per division. This is a scale reference, not a measured positioning-accuracy claim. Set the front assembly securely before making rear focus adjustments.
The interface is specified for TCS20. Compatibility with other camera platforms should not be inferred from a similar appearance.
Specifications
| Function | Rear focusing for TCS20 |
| Moving assembly | Camera body or digital-back side |
| Dial reference | 0.04 mm of travel per division |