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<?php $image = get_sub_field('image'); // returns ID ?>

<?php echo wp_get_attachment_image( $image, 'full' ); ?>

<?php
$imageinfo = get_post($image);
 $image_title = $imageinfo->post_title;
 $image_caption = $imageinfo->post_excerpt;

  // echo $image;
  // echo $image_title;
//   echo $image_caption;
 ?>
<?php if ($image_caption): ?>
  <div class="image-caption">
    <?php echo $image_caption; ?>
  </div>
  <!-- image-caption     -->
<?php endif; ?>