For customers using SIGMA Optimization Pro 1.4.0 Windows

Thank you for purchasing and using our products.

We have found that the Window’s version of SIGMA Optimization Pro1.4.0* may not work properly when activation of the software is repeated.
There is a possibility that your information of adjusted value etc. saved in [History of Connected Products] may disappear when the following products are connected.

・CINE LENS
・SIGMA MOUNT CONVERTER　MC-11
・SIGMA ELECTRONIC FLASH EF-630

However, we are developing SIGMA Optimization Pro 1.4.1 Windows and in the new version, this phenomenon is corrected.
For customers using these products mentioned above, please refrain from using SOP until the new version is released.
Please note that connecting these products to the PC will not damage these products themselves.

We apologize for any inconvenience this may have caused to customers using Optimization Pro 1.4.0 Windows.

We appreciate your continued support for our company and products.

*SIGMA Optimization Pro is the dedicated software that enables you to connect lenses from new product lines to your computer via SIGMA USB Dock, and to customize the lens with operations such as firmware update and focus adjustment.