Lens data within EXIF/IPTC

I had the same problem and I think I've solved it. You need to modify some files to get basic lens information from the EXIF.

1. modify /modules/exif/lib/exifer/makers/nikon.inc - find and modify formatNikonData function

function formatNikonData($type,$tag,$intel,$model,$data) {

        if($tag=="0084" && $model == 1) { //LensInfo by PPl
            $data = bin2hex($data);
            if($intel==1) $data = intel2Moto($data);

            $focalShort = hexdec(substr($data,0,8));
            $divFocalShort = hexdec(substr($data,8,8));
            $focalLong = hexdec(substr($data,16,8));
            $divFocalLong = hexdec(substr($data,24,8));
            $apertShort = hexdec(substr($data,32,8));
            $divApertShort = hexdec(substr($data,40,8));
            $apertLong = hexdec(substr($data,48,8));
            $divApertLong = hexdec(substr($data,56,8));

            if ($divFocalShort > 0) $focalShort = $focalShort / $divFocalShort;
            if ($divFocalLong > 0) $focalLong = $focalLong / $divFocalLong;
            if ($divApertShort > 0) $apertShort = $apertShort / $divApertShort;
            if ($divApertLong > 0) $apertLong = $apertLong / $divApertLong;

            if ($focalShort == $focalLong)
                $data = $focalShort . "mm f/";
            else
                $data = $focalShort . "-" . $focalLong . "mm f/";

            if ($apertShort == $apertLong)
                $data = $data . $apertShort;
            else
                $data = $data . $apertShort . "-" . $apertLong;

        } else if($type=="ASCII") {
...

2. modify /modules/exif/classes/ExifHelper.class - find and modify getExifKeys functions

    function getExifKeys() {
        global $gallery;
        static $data;

        if (!empty($data)) {
            return $data;
        }

        $data['LensInfo'] = array($gallery->i18n('Lens Info'), 'SubIFD.MakerNote.LensInfo');
...

3. modify appropriate .po files and make them to see changes in gallery

.po files includes localized messages. We have added localized string "Lens Info". So if you are satisfied with the text "Lens Info", you need not to change anything. But if you need to translate it, you must add lines

msgid "Lens Info"
msgstr "Your translation goes here"

into appropriate .po file (located under /modules/exif/po directory).

After you make this change, you need to call "make install PO=xx", where xx is the name (without an extension) of changed file.

In my case, I have changes cs.po, so I need to call "make install PO=cs".

And sorry for my previous posts, there are encoded HTML entities, so you need to replace them in PHP, otherwise you get syntax errors... ;-(((

I have also encountered, that for some reason this doesn't work on all EXIF informations. My Nikon D200 is producing some EXIFs, which I cannot decode using this version of exif plugin. The problem is somewhere in detection of type Intel/Motorola Endian which in some cases goes wrong and I don't know why...

Hi guys

it doesn't work for me neither...
When I am opening a Nikon picture, the EXIF section seems to hang and is not displayed
Please help!

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