What is BEF plug-in for Adobe Photoshop?

BEF plug-in enables support for BEF file format (which is HDR Expose native file format). By default HDR Expose will install BEF plug-in for Adobe Photoshop, so that you can open and save BEF files in Photoshop.

BEF is a Unified Color HDR file format, similar to such formats as Radiance HDR or OpenEXR. It is however much more capable format, allowing you to store HDR images with high precision and high compression ratio. It achieves an impressive 2x-3x lead in compression efficiency over Radiance or OpenEXR, while preserving image data with full dynamic range, full color range and high visual precision.