How to create menu link to an individual field within a node in Drupal 7
The quickest might be with a MENU_LOCAL_TASK in a custom module, e.g.:

function YOURMODULE_menu() {

  $items=array();

  $items['node/%node/avatar'] = array (
    'title' =&gt; 'Avatar',
    'page callback' =&gt; 'YOURMODULE_node_avatar',
    'page arguments' =&gt; array(1),
    'access callback' =&gt; TRUE,
    'weight' =&gt; 64,
    'type' =&gt; MENU_LOCAL_TASK,
  );

  return $items;

}

function YOURMODULE_node_avatar($node) {
  // drupal_goto($node-&gt;field_avatar[0]['filepath']); // Drupal 6
  drupal_goto($node-&gt;field_avatar[LANGUAGE_NONE][0]['filepath']); // Drupal 7 (I think :)
}


which would create an Avatar tab for you that when clicked on would display the image in field_avatar.  Obviously you'd have to change that up to your exact field (and I think I got the D7 language stuff right in there if you are on D7).

It could also be called directly, e.g. www.YOURHOST.com/node/1/avatar would display the avatar of node with nid 1.  If this is going to be how you access it, you could change MENU_LOCAL_TASK to MENU_CALLBACK and then the Avatar tab wouldn't show up on the page.