SIMMOUNT MAMIYA 645 - PL CONVERSION KIT

Vintage Medium format photo lenses were never designed for cinema.
This is how you make them belong.

The Simmod SimMount Mamiya 645 to PL Conversion Kit is a precision-engineered system that converts Mamiya Sekor C 645 lenses into native PL-mounted cinema optics, unlocking their full potential on professional motion picture cameras.

A True Mount Conversion

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

The SimMount removes the original Mamiya 645 mount and replaces it with a solid PL interface, creating a rigid, unified connection. By eliminating intermediary components, it removes tolerance stacking, flex, and mechanical inconsistencies.

The result is a lens that behaves like it was built for PL from the start.

Built for Medium Format Optics

Mamiya 645 lenses offer unique rendering and large image coverage that pairs exceptionally well with modern cinema sensors.

This conversion allows those characteristics to be fully utilized in a professional environment without compromising stability or alignment.

Precision Engineering, Maintained Accuracy

Each SimMount is CNC machined to exact tolerances, ensuring:

• Accurate flange focal distance

• Maintained infinity focus

• Proper optical alignment across the image plane

This level of precision is critical when working with medium format glass. Any deviation compromises the image.

PL Mount Stability

The PL mount standard is widely used across the cinema industry for its durability and reliability under demanding conditions.

By converting to PL:

• You gain a positive-locking mount for maximum security

• You eliminate lens play and micro-movement

• You ensure consistent performance with follow focus motors and rigging systems

This is the mechanical foundation required for serious production work.

Robust Construction

The system is built from precision-machined metal components, designed to withstand real production environments:

• Rigid, stable mounting platform

• Durable finish for long-term use

• Engineered to handle the weight and torque of cinema setups

A medium format lens demands more from the mount. This system is built accordingly.

Installation Approach

The conversion process involves:

• Removing the original Mamiya 645 mount

• Installing the SimMount PL system using supplied hardware

• Fine-tuning alignment if required

No optical changes are made. Only the mechanical interface is upgraded.

Why It Matters

Medium format lenses offer a look that is difficult to replicate.
The limitation has always been usability.

With the SimMount Mamiya 645 to PL Conversion Kit:

• Your lenses become native to PL camera systems

• Stability improves across all shooting conditions

• Focus accuracy and repeatability are preserved

• Your lens set becomes viable for high-end production

The Simmod Approach

The SimMount Mamiya 645 to PL Conversion Kit is designed to bring structure, precision, and reliability to lenses that were never intended for cinema, without compromising the character that makes them valuable.Medium format character,locked into a true cinema system.