// in EXIF fields, you can choose to display fields in sub-arrays, for
// example ['COMPUTED']['ApertureFNumber']. for this, add
// 'COMPUTED;ApertureFNumber' in $conf['show_exif_fields']
//
// The key displayed in picture.php will be $lang['exif_field_Make'] for
// example and if it exists. For compound fields, only take into account the
// last part : for key 'COMPUTED;ApertureFNumber', you need
// $lang['exif_field_ApertureFNumber']
$conf['show_exif_fields'] = array('Make',
                                  'Model',
                                  'DateTime',
                                  'COMPUTED;ApertureFNumber');