The standard convention for product pages is to show a smallish product image and give the shopper the option to click or mouse over for a larger view.
But we all know product images have a huge influence on conversion rates. And that larger, more detailed, product images are always better than smaller product images.
Entertainmentearth.com defies convention. Their product pages display products in the largest size possible (no need to click or mouse over for zoomed view). Check it out–