For me, not necessarily. Not yet. In my case, i show only few exifs informations, but i write some exifs only for me (for mémory). It's possible to add, in "ivExifParser.class.php", some lines for the new entries like ( 'Aperture', - 'FocalLength', - 'ISOSpeed', - //'ExposureBias', - //'Flash', - /...