MC-11 Mount Converter
The Mount Converter MC-11 allows you to use your Sigma SA mount and Sigma EOS mount interchangeable lenses with the Sony E-mount camera body. Until now, the market has seen the introduction of many methods for using lenses from one camera system with a body from a different system. In the digital age, however, camera systems have become much more complex, and it is challenging to create a mount converter that aligns both the mechanics and software of the lens and body. Sigma created a converter that matches lenses for current DSLRs to bodies for mirrorless interchangeable-lens camera systems is even more challenging. Now the market demands a converter that goes beyond simply aligning the flange back distance to retaining full functionality.
Note: Only available in the US
Our Review
Sigma MC-11 Mount Converter — Bridge Your Existing Lens Collection to Sony Mirrorless Without Starting Over
The gist: If your work is moving from a Sigma or Canon DSLR setup to a Sony mirrorless body, the MC-11 lets you keep shooting with your existing lenses at full autofocus capability while your budget catches up to native glass.
- Full Sony AF system access: Eye-AF, tracking AF, and all other Sony AF modes work through the adapter — critical for video and portraiture work where manual focus is not an option.
- Protects your lens investment: Works with Sigma SA-mount and Canon EF-mount Sigma lenses, meaning you don’t have to sell your entire kit the day you buy a Sony body.
- Firmware updatable via USB: Long-term compatibility with new Sony and Sigma firmware through Sigma Optimization Pro keeps the adapter relevant as camera bodies update.
- Auto-exposure and aperture control: Full electronic communication preserves TTL metering and aperture adjustment — your workflow stays the same, just with a Sony body on the back end.
The Phoblographer tested the MC-11 and highlighted its autofocus fidelity as what sets it apart from generic adapters that frustrate users with lag or hunt-and-miss focus behavior.
Best for: Working photographers or videographers transitioning from a Sigma or Canon EF system to Sony E-mount who need to keep shooting during the transition. Skip it if: you are already shooting native Sony E-mount glass or use a different lens mount system. Runs ~$186 — check the current price before buying.
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