SIMMOUNT MAMIYA 645 to LPL CONVERSION MOUNT

Vintage Medium format photo glass was never meant to exist in a modern cinema system.
That’s exactly why it matters.

The Simmod SimMount Mamiya 645 to LPL Conversion Mount is engineered to convert Mamiya Sekor C 645 lenses into native LPL-mounted cinema tools, unlocking their full potential on today’s large-format digital cameras.

A True Conversion System

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

The SimMount system replaces the original Mamiya 645 mount with a precision LPL interface, creating a rigid, unified connection. By removing intermediary components, it eliminates tolerance stacking and mechanical instability.

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

Built for the Mamiya 645 Platform

Designed specifically for Mamiya Sekor C 645 lenses, this system allows you to fully utilize a medium format lens lineup within a modern cinema environment. (simmod)

These lenses offer unique rendering and coverage characteristics that pair exceptionally well with large-format sensors. The SimMount makes that pairing practical.

Precision Engineering, Maintained Accuracy

Each mount is CNC machined to exact tolerances, ensuring:

• Accurate focal flange distance

• Full infinity focus range

• Proper optical alignment across the image plane (simmod)

This level of precision is critical. Without it, medium format optics lose their integrity when adapted.

Robust, Production-Ready Construction

The system combines:

• A solid brass LPL mount

• A knurled billet aluminum sub-mount

• A full shim set for fine calibration (simmod)

The result is a durable, stable interface that holds up under real production conditions, including motorized focus systems and fully rigged builds.

Why LPL Matters

The LPL mount standard, developed by ARRI, was designed for modern large-format sensors and higher mechanical demands.

By converting to LPL:

• You gain a positive-locking mount for maximum stability

• You reduce lens play and mount flex

• You future-proof your lenses for modern cinema ecosystems

This is not just compatibility. It is alignment with where the industry is going.

Installation Approach

The conversion process is straightforward:

• Remove the original mount from the lens

• Install the SimMount sub-mount and LPL mount

• Fine-tune with included shims if needed

No optical changes are made to the lens itself. Only the interface is upgraded.

Why It Matters

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

With the SimMount Mamiya 645 to LPL Conversion:

• Your lenses become native to LPL camera systems

• Mechanical stability is significantly improved

• Focus accuracy remains consistent

• Your lens set becomes viable for high-end production

The Simmod Approach

Simmod does not chase compatibility. It builds systems that elevate performance.

The SimMount Mamiya 645 to LPL Conversion Mount is designed to bring structure, precision, and reliability to lenses that were never intended for this level of use.

Medium format character,
now engineered for cinema.