My first attempt at the Zoo
 

Here are some pictures captured in Washington DC zoo.</p>
<p><img src="http://img11.imageshack.us/img11/3994/dsc1975sign.jpg" border="0" alt="" /></p>
<p>f/6.3 1/250 sec ISO-1600 370mm (Sigma 50-500mm)</p>
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<p><img src="http://img13.imageshack.us/img13/1685/dsc2079sign.jpg" border="0" alt="" /></p>
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<p>f/6.3 1/500sec ISO-200 420mm (Sigma 50-500mm)</p>
<p>&n