Simmod SimMount Leica R to EF Conversion Kit

A True Mount Conversion

This is not an adapter that sits between lens and camera.
This is a direct mount replacement system.

Vintage lenses were never designed for modern camera systems. This is how you change that properly.

The Simmod SimMount Leica R to EF Conversion Kit is a precision-engineered solution that converts Leica R lenses into a native Canon EF mount, allowing them to integrate seamlessly with a wide range of digital cinema and still cameras.

The SimMount kit removes the original Leica R mount and replaces it with a solid EF mount, effectively turning your lens into a native EF lens. This eliminates the weaknesses of traditional adapters and creates a more stable, reliable connection.

The result is a lens that behaves as if it was built for the system from the start.

Precision and Reliability

Each mount is machined to exact tolerances, ensuring:

• Accurate flange distance

• Maintained infinity focus

• Proper optical alignment

The system is designed to preserve the integrity of the lens while delivering consistent performance across professional workflows. (B&H Photo Video)

A secure mechanical fit eliminates play, flex, or misalignment, even under demanding conditions.

Durable, Functional Construction

The SimMount conversion is built using solid metal construction, designed for long-term durability and repeated use. (B&H Photo Video)

• Tight, secure fit with no gaps or movement

• Matte black finish to reduce internal reflections

• Engineered for both handheld and rig-based shooting environments

Designed for Modern Camera Systems

Once converted, Leica R lenses can be used across a wide range of EF-mount systems, including:

• Canon EF and EF-S cameras

• Cinema cameras from Blackmagic, RED, and others that support EF mount (CineD)

This expands the usability of vintage glass into modern production ecosystems without compromising performance.

Installation Approach

The conversion process involves:

• Removing the original Leica R mount

• Installing the SimMount EF replacement using supplied screws

This creates a direct mechanical interface, but it is important to note that the process modifies the lens and may void the original manufacturer warranty. (B&H Photo Video)

Why It Matters

Adapters solve compatibility at the surface level.
Conversions solve it at the foundation.

With the SimMount Leica R to EF Conversion Kit:

• Your lenses become native to your camera system

• Stability improves across all shooting conditions

• Focus accuracy and repeatability are preserved

• Your investment in vintage optics becomes far more versatile

The Simmod Approach

Simmod does not build shortcuts.
It builds systems. The SimMount EF Conversion Kit reflects that philosophy. It is a clean, precise, and intentional upgrade that transforms Leica R lenses into reliable tools for modern cinematography.