# SfmDataIO Changelog

List of changes to the file formats ABC (Alembic) and SFM (JSON).


## Develop Version

### File Version 1.2.1
- The principal point (the projection of the optical center) is now relative to the center of image (and no more to the top-left corner). It is defined in pixel coordinates in all cases.

### File Version 1.2.0
- Split focal length on x and y


## Release 2.4.0 (2021/02/26)

### File Version 1.2


