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Hello, I prepared a small hack, which converts EXIF Focal Length to 35mm equivalent.
I tested it with version 11 and also Bootstrap Darkroom Template with PhotoSwipe Captions (but I think it works with all themes).
It leaves the value for not defined cameras (200 mm).
It adds eq. for $conf defined camera values (320 mm eq.)
In Local Files Editor add this configuration based upon your gear
('EXIF Camera Model Name' => crop factor)
$conf['exif_focal_length_to35mm'] = array(
'Canon EOS 70D' => 1.6,
'Canon EOS DIGITAL REBEL XTi' => 1.6,
'C2100UZ' => 5.43,
'DSC-T30' => 6
);You also have to modify /include/functions_metadata.inc.php
(line 194, add the code right before return $result;)
// 35mm eq convert
if (array_key_exists('exif_focal_length_to35mm', $conf)) {
$conv_fl = $conf['exif_focal_length_to35mm'];
if (array_key_exists('model',$result)) {$model_key = 'model'; $focal_key = 'focal_length';}
else {$model_key = 'Model'; $focal_key = 'FocalLength';}
if (array_key_exists($focal_key, $result)) {
$value = (int) filter_var($result[$focal_key], FILTER_SANITIZE_NUMBER_INT);
$model = trim($result[$model_key]);
if (array_key_exists($model, $conv_fl)) $f35 = round($value*$conv_fl[$model]).' mm eq.';
else $f35 = $value.' mm';
$result[$focal_key] = $f35;
}
}
// end of 35mm eq convertThat's all. I hope it helps somebody.
Following Piwigo upgrade may revert back this changes :-(
Last edited by FelixPiwigo (2021-01-30 22:20:40)
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