Yes. darktable relies on Lensfun’s mount compatibility data, so adapted manual lenses may not appear unless the adapter relationship is defined. One way is to use the Lensfun command-line helper `lensfun-add-adapter` to add the adapter mapping. You can also do it manually by creating a `_mounts.xml` file in your personal Lensfun data folder (for example, `~/.local/share/lensfun` on Linux) and adding compatibility entries so Sony E is marked as compatible with mounts like `Minolta MD`. Example structure: ```xml Sony E Minolta MD ``` You can include other adapted mounts too if needed. After updating Lensfun’s mount data, darktable should let you choose supported Minolta MD lenses in the lens correction module. If it still doesn’t appear, make sure the Lensfun database actually contains that specific lens model and restart darktable after making changes.