.zoom{
	display: inline-block;
}

.main-image{
	position: relative;
}

.main-image img{
	width: 600px;
	height: 400px;
}

.zoomed-image{
	width: 600px;
	height: 400px;
	background-size: calc(600px * 4);
	background-position: 0 0;
}

.zoomer{
	position: absolute;
	top: 0;
	left: 0;
	width: 150px;
	height: 100px;
	border: 1px solid white;
	pointer-events: none;
}