iophtgrphs

Solved it:

To get the calculated value of the focal length like it is done at the image.php of wordpress with “wp_exif_frac2dec($str), I just added:

if($key == "FocalLength“) {
	$value = wp_exif_frac2dec($value);
}

after the line:

$value = str_replace("", '', $value);

within the “image-metadata-cruncher.php”.