Efecto Hover CSS3 primera forma

Hover Css3

by JavaFace

HTML

<div class="contenedor">
    <!--ANUN1-->
    <div class="vista imagen_efecto">
        <img src="https://lh4.googleusercontent.com/-5QAQ9YcryB8/UUx9FYF1KrI/AAAAAAAAFOw/U50B8ozIU8o/s278/ey.jpg" />
        <div class="mascara">
             <h2>Anunciate</h2>

            <p>Tenemos los mejores precios del internet</p> <a href="#" class="info">Leer mas</a>

        </div>
    </div>
    <!--ANUN2-->
    <div class="vista imagen_efecto">
        <img src="https://lh4.googleusercontent.com/-5QAQ9YcryB8/UUx9FYF1KrI/AAAAAAAAFOw/U50B8ozIU8o/s278/ey.jpg" />
        <div class="mascara">
             <h2>Anunciate</h2>

            <p>Tenemos los mejores precios del internet</p> <a href="#" class="info">Leer mas</a>

        </div>
    </div>
    <!--ANUN3-->
    <div class="vista imagen_efecto">
        <img src="https://lh4.googleusercontent.com/-5QAQ9YcryB8/UUx9FYF1KrI/AAAAAAAAFOw/U50B8ozIU8o/s278/ey.jpg" />
        <div class="mascara">
             <h2>Anunciate</h2>

            <p>Tenemos los mejores precios del internet</p> <a href="#" class="info">Leer mas</a>

        </div>
    </div>
    <!--ANUN4-->
    <div class="vista imagen_efecto">
        <img src="https://lh4.googleusercontent.com/-5QAQ9YcryB8/UUx9FYF1KrI/AAAAAAAAFOw/U50B8ozIU8o/s278/ey.jpg" />
        <div class="mascara">
             <h2>Anunciate</h2>

            <p>Tenemos los mejores precios del internet</p> <a href="#" class="info">Leer mas</a>

        </div>
    </div>
    <!--fin-->
</div>
<!--fin-->

CSS

.contenedor {
    position:relative;
    width:680px;
    margin: 0 auto;
}
.vista {
    width: 278px;
    /*ancho*/
    height: 231px;
    /*alto*/
    margin:-5px;
    float: left;
    border: 10px solid #fff;
    overflow: hidden;
    position: relative;
    text-align: center;
    -webkit-box-shadow: 1px 1px 2px #e6e6e6;
    -moz-box-shadow: 1px 1px 2px #e6e6e6;
    box-shadow: 1px 1px 2px #e6e6e6;
    cursor: default;
    background: #fff url(images/bgimg.jpg) no-repeat center center;
}
.vista .mascara, .vista .content {
    width: 278px;
    height: 231px;
    position: absolute;
    overflow: hidden;
    top: 0;
    left: 0;
}
.vista img {
    display: block;
    position: relative;
}
.vista h2 {
    font-family:"wf_SegoeUILight", "Segoe UI Light", "Segoe WP Light", "wf_SegoeUI", "Segoe UI", "Tahoma", Arial, Verdana, sans-serif;
    text-transform: uppercase;
    color: #fff;
    text-align: center;
    position: relative;
    font-size: 20px;
    font-weight:bold;
    padding: 10px;
    background: rgba(0, 0, 0, 0.8);
    margin: 20px 0 0 0;
}
.vista p {
    font-family:"wf_SegoeUILight", "Segoe UI Light", "Segoe WP Light", "wf_SegoeUI", "Segoe UI", "Tahoma", Arial, Verdana, sans-serif;
    font-size: 16px;
    position: relative;
    color: #fff;
    padding: 10px 20px 20px;
    text-align: center;
}
.vista a.info {
    font-family:"wf_SegoeUILight", "Segoe UI Light", "Segoe WP Light", "wf_SegoeUI", "Segoe UI", "Tahoma", Arial, Verdana, sans-serif;
    font-weight:bold;
    display: inline-block;
    text-decoration: none;
    padding: 7px 14px;
    background-color: rgba(0, 0, 0, 0.5);
    background-image: -webkit-linear-gradient(rgba(255, 255, 255, .5), rgba(255, 255, 255, 0));
    background-image: -moz-linear-gradient(rgba(255, 255, 255, .5), rgba(255, 255, 255, 0));
    background-image: -ms-linear-gradient(rgba(255, 255, 255, .5), rgba(255, 255, 255, 0));
    background-image: -o-linear-gradient(rgba(255, 255, 255, .5), rgba(255, 255, 255, 0));
  ...