Responsive image align center bootstrap 3

I do a catalog using Bootstrap 3. When displayed on tablets, the product images look ugly because of their small size (500x500) and a width of 767 pixels in the browser. I want to put the image in the center of the screen, but for some reason I can not. Who be will help solve the problem?

There is .center-block class in Twitter Bootstrap 3 (Since v3.0.1), so use:

<img src="..." alt="..." class="img-responsive center-block" />

If you're using Bootstrap v3.0.1 or greater, you should use this solution instead. It doesn't override Bootstrap's styles with custom CSS, but instead uses a Bootstrap feature.

My original answer is shown below for posterity

This is a pleasantly easy fix. Because .img-responsive from Bootstrap already sets display: block, you can use margin: 0 auto to center the image:

.product .img-responsive {
    margin: 0 auto;
}