There was a download of SIGMA Optimization Pro 184.108.40.206 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. SOP.exe is the frequent file name to indicate this program's installer.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The following versions: 1.6, 1.4 and 1.3 are the most frequently downloaded ones by the program users. The program lies within System Utilities, more precisely Device Assistants. The latest version of the software is supported on PCs running Windows XP/Vista/7/8/10/11, 32-bit. This free tool was originally produced by SIGMA.
From the developer:
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. Also, with this app, you can update your device firmware.
You may want to check out more software, such as SIGMA Photo Pro, Cutting Optimization pro or Ashampoo Video Optimizer Pro, which might be similar to SIGMA Optimization Pro.