You can change it with my solutions as
Open templates/ja_lens/css/template.css file
from
.masonry .item .header h2 {
font-size: 200%;
margin-bottom: 5px;
margin-top: 0;
display: block;
text-align: center;
}
.masonry .item:hover .item-image img,
body.popupview .masonry .item:hover .item-image img,
.masonry .item.clicked .item-image img {
opacity: 0.1;
filter: alpha(opacity=10);
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=10)";
}
change to
.masonry .item .header h2 {
font-size: 200%;
margin-bottom: 5px;
margin-top: 0;
display: none;
text-align: center;
}
.masonry .item:hover .item-image img,
body.popupview .masonry .item:hover .item-image img,
.masonry .item.clicked .item-image img {
opacity: 0.7;
filter: alpha(opacity=10);
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=10)";
}
Let me know the result