The primary upgrade of the new lens is related to digital communication with the camera. Data transfer is now controlled by a 16-bit CPU instead of the previous 4-bit CPU.
The advantages of the new CPU are:
Rewritability: The new 16-bit CPU is rewritable and can be overwritten with firmware upgrades that would be required for compatibility with future cameras and digital backs.
Finer Lens Correction: Thanks to the bigger capacity of the CPU, the new lens has more lens data. It is possible to apply finer lens-characteristic corrections when using Mamiya’s Digital Photostudio® software.
Fast, Reliable Communication: The new CPU enables faster and more reliable communication with the camera body.
As its name suggests, the new D-series lens shows its true capabilities when shooting with the Mamiya ZD Digital back and other high-end digital backs. However, it is designed to be equally at home with film backs.
The new Mamiya Sekor Macro MF 120mm f/4 D Lens is compatible with the Mamiya 645AFD ll camera and is available for immediate delivery.