#contenedor {
    height:620px;
	width:100%;
	margin-bottom:0px;
	margin-left: auto;
	margin-right:auto;
}

#imagen{ height:600px;
		width:100%;
		margin-bottom:0px;
		margin-left: auto;
		margin-right:auto;
		background-image:url(../imagenes/imagen1.jpg);
}

.img{max-height:100%;
max-width:100%;
}