Hello, My understanding is that the JFIF is the most basic of JPEG images and that funcionally the EXIF is a superset of JFIF, is that correct? I came across the following article which states that an image can either be JFIF or EXIF, is this correct? " Strictly speaking, the JFIF and Exif standards are incompatible because they each specify that their header appears first. In practice, most JPEG files in Exif format contain a small JFIF header that precedes the Exif header. This allows older readers to correctly handle the older format JFIF header, while newer readers also decode the following Exif header. " ref: http://wapedia.mobi/en/JPEG?t=4.