Mouse Over Zoom
Mouse Over Zoom is a Joomla Extension that enables you to view bigger versions of thumbnails. Just move the mouse over the thumbnail to view zoomed image with predefined zoom level (x2, x3, x4, x2.5, etc.), without loading a new page.
You can customize this plugin with a lot of additional options.
A plugin to zoom images on mouse over event.
There are two options:
1. Zoom-in the image
2. Zoom-in the image and show another image (better quality) in the end.
Also, there is a zoom factor - how much to zoom the image x2, x3, etc.; and the link and its target options.