Used Leica TL-Mount Zoom Lenses: APS-C Mirrorless

Yes, but with a 1.5× APS-C crop applied. TL lenses share the L-mount bayonet with SL bodies, but they're designed for the smaller APS-C sensor and don't fully cover the SL's full-frame sensor. SL, SL2, and SL3 bodies automatically detect a TL lens and switch into APS-C crop mode, recording only the central portion of the sensor. You retain autofocus, image stabilization, and full electronic control, just at reduced resolution. The reverse (SL lenses on a TL body) works normally without crop.

Body support ended in May 2022 when Leica discontinued the CL and TL2. Lenses are no longer in production. Leica continues to honor warranty service on existing TL-system equipment but no new TL-specific products are being developed. If you shoot a TL or CL body and value warranty support, factor in that you're on the supported-but-not-current-production track. The lenses themselves work indefinitely on SL bodies in crop mode.

Buy SL lenses unless price is the dominant factor. TL zooms cost less used ($436–$3,998 range) than SL equivalents ($1,000–$7,778), but you give up the full-frame resolution of the SL sensor when mounting a TL lens. On an SL3 body that's the difference between a 60MP image and a ~26MP crop. For specialty use cases, particularly the Super-Vario-Elmar-TL 11-23mm where no equivalent SL ultra-wide exists at similar price, TL on SL can make sense. For general shooting, SL-native lenses are the right buy.