.parent {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    overflow: auto;
}

.block {
    width: 900px;
    height: 579px;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: auto;
}    
    
.block  img {
        max-width: auto;
        height: auto;
        display: block;
        margin: 0 auto;
        border: none;
    }