Post: http://technology.mattrude.com/2010/07/display-exif-data-on-wordpress-gallery-post-image/

gistfile1.php

<?php

/*********************************************************************************
  Using WordPress functions to retrieve the extracted EXIF
  information from database
*/
function mdr_exif() { ?>
  <div id="exif">
    <h3 class='comment-title exif-title'><?php _e('Images EXIF Data'); ?></h3>
    <div id="exif-data">
      <?php
      $imgmeta = wp_get_attachment_metadata( $id );
      // Convert the shutter speed retrieve from database to fraction
      $image_shutter_speed = $imgmeta['image_meta']['shutter_speed'];
      if ($image_shutter_speed > 0) {
        if ((1 / $image_shutter_speed) > 1) {
          if ((number_format((1 / $image_shutter_speed), 1)) == 1.3
            or number_format((1 / $image_shutter_speed), 1) == 1.5
            or number_format((1 / $image_shutter_speed), 1) == 1.6
            or number_format((1 / $image_shutter_speed), 1) == 2.5){
            $pshutter = "1/" . number_format((1 / $image_shutter_speed), 1, '.', '') ." ".__('second');
          } else {
            $pshutter = "1/" . number_format((1 / $image_shutter_speed), 0, '.', '') ." ".__('second');
          }
        } else {
          $pshutter = $image_shutter_speed ." ".__('seconds');
        }
      }

      // Start to display EXIF and IPTC data of digital photograph
      echo "<p>" . date("d-M-Y H:i:s", $imgmeta['image_meta']['created_timestamp'])."</p>";
      echo "<p>" . $imgmeta['image_meta']['camera']."</p>";
      echo "<p>" . $imgmeta['image_meta']['focal_length']."mm</p>";
      echo "<p>f/" . $imgmeta['image_meta']['aperture']."</p>";
      echo "<p>" . $imgmeta['image_meta']['iso']."</p>";
      echo "<p>" . $pshutter . "</p>"
      ?>
    </div>
    <div id="exif-lable">
      <?php // EXIF Titles
      echo "<p><span>".__('Date Taken:')."</span>";
      echo "<p><span>".__('Camera:')."</span>";
      echo "<p><span>".__('Focal Length:')."</span>";
      echo "<p><span>".__('Aperture:')."</span>";
      echo "<p><span>".__('ISO:')."</span>";
      echo "<p><span>".__('Shutter Speed:')."</span>"; ?>
    </div>
  </div>
<?php } 

?>

gistfile2.css

/*EXIF table*/
#exif { overflow: hidden; margin: 0; padding: 0 10px 0 0; }
#exif-lable { margin: 0 0 0 15px; width: 125px; }
#exif-lable p { margin: 0; }
#exif-lable span { font-weight:bold; }
#exif-data { overflow: hidden; margin: 0; float: right; width: 540px; }
#exif-data p { margin: 0 10px; }

gistfile3.php

<?php mdr_exif(); ?>