Most other sites such as Amazon.com have the product page so when you hover over the Additional Photos, it changes the lager Product Picture dynamically. nopCommerce should also mimic this capability. Clicking the main Product Picture should zoom to a larger photo. And, add a magnifying capability when hovering over the Product Picture.
http://www.amazon.com/gp/product/B005890G8Y/ref=famstripe_kt
