Get extended image metadata, exif or iptc as available.Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso
created_timestamp, focal_length, shutter_speed, and title.
The IPTC metadata that is retrieved is APP13, credit, byline, created date
and time, caption, copyright, and title. Also includes FNumber, Model,
DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.