Lens-Profiles provide an easy way to automatically correct distortion, vignetting and chromatic-aberration for common lenses.

Photo Mate ships with the Lensfun Database, which contains several profiles for lenses from various manufacturers.

When you open a raw-file, Photo Mate will read the exif-data and check if it finds a suited lens. If so, the option "Use Profile" is enabled. Activate it to use the automatically detected profile.
Note: When you use a Fixed-Lens camera and edit your raw, this option is may active by default.

Important: When editing jpg-files, your camera may already applied lens-corrections. Do not use this option in such cases.