HTML

<div class="hovergallery13"><img src="http://gif" alt="" width="185px" height="210px" /><img src="http://gif" alt="" width="185px" height="210px" /></div>

CSS

<style type="text/css"><!--
.hovergallery13 img{ -webkit-transform:scale(0.8);
border-radius: 5%;
border: 1px dotted #000;
-moz-transform:scale(0.9);
-o-transform:scale(0.9);
-ms-transform:scale(0.9);
 -webkit-transition-duration: 0.8s;
-moz-transition-duration: 0.8s; 
-o-transition-duration: 0.8s ;
-ms-transition-duration: 0.8s ;opacity: 0.7;
 /*Nivel de opacidad de las imágenes*/
 margin: 0 10px 5px 0; /*Margen entre las imágenes*/
box-shadow:0px 2px 10px #000;
}.hovergallery13 img:hover{ 
opacity: 1;
 -webkit-transition: 500ms;
 -webkit-transform: rotate(140deg);

 -webkit-transition: 0.8s linear;
 transition: 0.8s linear;
 }
 opacity: 1;
 -webkit-transition: 500ms;
 -webkit-transform: rotate(140deg);
}
--></style>