kasiel

Thank you, that was helpful! 🙂

The problem: The very high iso values are to find in EXIF[‘UndefinedTag:0x8832’], not in the EXIF[‘ISOSpeedRatings’] as I expected.

I created an new folder in wp-content/plugins: meow-lightbox-iso-fix
I created a new file: meow-lightbox-iso-fix.php within the folder with this code:

<?php
/**
 * Plugin Name: Meow Lightbox ISO Fix
 * Description: Liest das ISO aus EXIF (Nikon-Tag 0x8832) und gibt es an Meow Lightbox zurück.
 * Version: 4.0
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

add_filter( 'mwl_img_iso', 'kk_force_exif_iso_from_tag_8832', 10, 3 );

function kk_force_exif_iso_from_tag_8832( $iso, $id, $meta ) {

    // Dateipfad des Attachments holen
    $file_path = get_attached_file( $id );
    if ( ! $file_path || ! file_exists( $file_path ) ) {
        return $iso;
    }

    // EXIF-Funktion vorhanden?
    if ( ! function_exists( 'exif_read_data' ) ) {
        return $iso;
    }

    // EXIF-Daten laden (alle Sektionen)
    $exif = @exif_read_data( $file_path, 0, true );
    if ( ! is_array( $exif ) || ! isset( $exif['EXIF'] ) ) {
        return $iso;
    }

    $exif_exif = $exif['EXIF'];

    // 1. Nikon / hoher ISO-Wert in UndefinedTag:0x8832
    if ( isset( $exif_exif['UndefinedTag:0x8832'] ) ) {

        $val = $exif_exif['UndefinedTag:0x8832'];

        // Kann theoretisch auch ein Array sein
        if ( is_array( $val ) ) {
            $val = reset( $val );
        }

        $new_iso = (int) $val;

        if ( $new_iso > 0 && $new_iso < 1000000 ) {
            return $new_iso; // z.B. 80000
        }
    }

    // 2. Fallback: normale ISO-Felder versuchen

    if ( isset( $exif_exif['ISOSpeedRatings'] ) ) {
        $val = $exif_exif['ISOSpeedRatings'];
        if ( is_array( $val ) ) {
            $val = reset( $val );
        }
        $fallback_iso = (int) $val;
        if ( $fallback_iso > 0 && $fallback_iso < 1000000 ) {
            return $fallback_iso;
        }
    }

    if ( isset( $exif_exif['PhotographicSensitivity'] ) ) {
        $fallback_iso = (int) $exif_exif['PhotographicSensitivity'];
        if ( $fallback_iso > 0 && $fallback_iso < 1000000 ) {
            return $fallback_iso;
        }
    }

    // 3. Wenn alles nichts bringt → ursprünglichen Wert von Meow zurückgeben
    return $iso;
}

Thank you for the answer.

Yes, the campaign token is set.

The form is back again under all my articles.

The 404 ist back again, too. And the address of the recipient is not entered in the list.