Supported

The file format libopenraw supports even partially:

Compression

Known compression schemes used.

Not Supported

The file format that are not supported due to lack of documentation, sample or resources. There is a plan to support them in the long term. Any help is welcome.

Metadata

Lens Types

MakerNotes usually store the lens type in some way. Sometime as a string, sometime as an numerical ID, or something else. There is no standard and it is mostly per vendor.

Nikon

See NEF documentation

Pentax

See PEF documentation

Canon

See CR2 documentation

Other references

Sample Files

The internet is somewhat rich in sample files. The manufacturers however don’t provide any. Some sources: