.one {
    color:#b4eeb4;
}
.one:before {
    content:'D';
    color:#00ced1;
    font-family: Pompadur, 'Comic Sans MS', cursive;
}

<div class="image">
    <img src="http://image.shutterstock.com/display_pic_with_logo/903799/224493577/stock-vector-set-of-people-icons-in-flat-style-with-faces-vector-women-men-character-224493577.jpg">
    <div class="caption">
        <div class="lupa "></div>
    </div>

.image {
    position: absolute;
}
.image .caption {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 2;
    left: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    transition: all 0.7s;
    opacity: 0;
}
.image .caption:hover {
    opacity: 1;
    visibility: visible;
}
.lupa {
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 2;
    left: 0;
    top: 0;
    background: url(http://rabochii.ucoz.net/magnifying47.png);
    background-repeat: no-repeat;
    background-position: center center;
}