Zoom image on hover : <p>How can I make a image in my social feed to zoom when I hover over it.</p>

<p>similar to the instagram feed on the left in <a href="http://defiance-theme.tumblr.com" rel="nofollow">this site</a>.</p>

<p>I tried this in the hover css:</p>

<pre><code>opacity: 0.5; 
filter: alpha(opacity=50);
</code></pre>

<p>but I couldn't get it to zoom.</p>
