To turn off the zoom:
1) Go to Sites > [site name] > Products > [product name] > General tab > Product Detail Page section.
2) Turn off the "Display product image on product detail page" setting.
3) Go to Sites > [site name] > Products > [product name] > Description tab > Long Description section.
4) Upload an image into the long description. To upload an image, use the image manager button in the text editor.