RAW Format
Olympus XZ-2 iHS has the ability to create RAW files. RAW format is the uncompressed version of a photo that the camera takes. This is useful when you take pictures and wish to edit them later to manual touch up the photo.
The Olympus XZ-2 iHS' RAW file type is ORF and the file size is 18,869 KB. This means on a standard DVD, I can only store 227 files.
On a recent trip to Disney World, I took 425 RAW pictures which takes up 7.67 GB of space!
Apple's iPhoto is one of many photo applications that supports the RAW format for editing.