Image moves on hover when apply an opacity and transform - html

Question

I have applied an effect to the image and when I hover over it it moves very strange, it is a move very small but I don't like it, also the text over the image moves when the mouse is out from the image.
This is my code, as you can see is a very imperceptible, but looks strange.
I also would like to make the images responsive when I change resolution, but I would like to have a height like 150px and make the image centered or crop it to the height.
This is my pen code: http://codepen.io/yunielth/pen/wWRydp
HTML
<div class="picture-block margin-0">
<div class="col-lg-3 col-md-6 sub-box-picture">
<div class="content-inner">
<div class="entry-thumbnail">
<div class="thumbnail"><a title="" href="/cursos/madrid"><img src="http://charitywp.thimpress.com/demo-4/wp-content/uploads/sites/6/2016/03/01_home_01_13-370x270.jpg"" alt="" title=""></a></div>
<a class="ciudades" title="" href="">Product 1</a>See more
</div>
</div>
</div>
<div class="col-lg-3 col-md-6 sub-box-picture">
<div class="content-inner">
<div class="entry-thumbnail">
<div class="thumbnail"><a title="" href=""><img src="http://charitywp.thimpress.com/demo-4/wp-content/uploads/sites/6/2016/03/01_home_01_13-370x270.jpg"" alt="" title=""></a></div>
<a class="ciudades" title="" href="">Product 2</a>See more
</div>
</div>
</div>
<div class="col-lg-3 col-md-6 hidden-xs sub-box-picture">
<div class="content-inner">
<div class="entry-thumbnail">
<div class="thumbnail"><a title="" href=""><img src="http://charitywp.thimpress.com/demo-4/wp-content/uploads/sites/6/2016/03/01_home_01_13-370x270.jpg"" alt="" title=""></a></div>
<a class="ciudades" title="" href="">Product 3</a>See more
</div>
</div>
</div>
<div class="col-lg-3 col-md-6 hidden-xs sub-box-picture">
<div class="content-inner">
<div class="entry-thumbnail">
<div class="thumbnail"><a title="" href=""><img src="http://charitywp.thimpress.com/demo-4/wp-content/uploads/sites/6/2016/03/01_home_01_13-370x270.jpg"" alt="" title=""></a></div>
<a class="ciudades" title="" href="">Product 4</a>See more
</div>
</div>
</div>
</div>
CSS
.ciudades{
color: #ffffff;
display: table-cell;
font-size: 24px;
font-weight: 500;
line-height: 25px;
text-align: center;
text-shadow: 1px 2px #333;
vertical-align: middle;
width: 90%;
}
.sub-box-picture .content-inner {
border: none;
background-color: #FFF;
}
.sub-box-picture .entry-thumbnail {
position: relative;
overflow: hidden;
text-align: center;
}
.sub-box-picture .entry-thumbnail .thumbnail::before {
background: #000 none repeat scroll 0 0;
bottom: 0;
content: "";
left: 0;
opacity: 0;
position: absolute;
right: 0;
top: 0;
transition: all 0.3s ease 0s;
z-index: 2;
}
.sub-box-picture .thumbnail {
position: relative;
overflow: hidden;
padding: 0;
}
.sub-box-picture .thumbnail img {
width: 100%;
-webkit-transition: all 1s;
-moz-transition: all 1s;
-o-transition: all 1s;
-ms-transition: all 1s;
transition: all 1s;
-webkit-transition: all all 1s ease;
-moz-transition: all all 1s ease;
-ms-transition: all all 1s ease;
-o-transition: all all 1s ease;
transition: all all 1s ease;
}
.sub-box-picture .thumbnail {
-webkit-border-radius: 0px;
-moz-border-radius: 0px;
border-radius: 0px;
border: none;
}
.sub-box-picture .ciudades {
transform: translate(-50%,-50%) scale(1);
-webkit-transform: translate(-50%,-50%) scale(1);
-moz-transform: translate(-50%,-50%) scale(1);
-ms-transform: translate(-50%,-50%) scale(1);
-o-transform: translate(-50%,-50%) scale(1);
left: 50%;
position: absolute;
top: 50%;
z-index: 3;
}
.thim-button.style3 {
display: none;
}
.sub-box-picture a.ciudades {
color: #ffffff;
text-decoration: none;
}
.sub-box-picture:hover .entry-thumbnail .thumbnail::before {
-moz-opacity: .5;
-khtml-opacity: .5;
-webkit-opacity: .5;
opacity: .5;
-ms-filter: alpha(opacity=50);
filter: alpha(opacity=50);
}
.thim-button.style3 {
display: block;
}
.sub-box-picture:hover .thumbnail img {
transform: scale(1.1);
-webkit-transform: scale(1.1);
-moz-transform: scale(1.1);
-ms-transform: scale(1.1);
-o-transform: scale(1.1);
-webkit-backface-visibility: hidden;
-moz-backface-visibility: hidden;
backface-visibility: hidden;
}
.sub-box-picture .thim-button.style3 {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%) scale(0);
-webkit-transform: translate(-50%,-50%) scale(0);
-moz-transform: translate(-50%,-50%) scale(0);
-ms-transform: translate(-50%,-50%) scale(0);
-o-transform: translate(-50%,-50%) scale(0);
-webkit-transition: all .5s ease-in-out 0s;
-moz-transition: all .5s ease-in-out 0s;
-o-transition: all .5s ease-in-out 0s;
-ms-transition: all .5s ease-in-out 0s;
transition: all .5s ease-in-out 0s;
-webkit-transition: all .3s ease;
-moz-transition: all .5s ease;
-ms-transition: all .5s ease;
-o-transition: all .5s ease;
transition: all .5s ease;
white-space: nowrap;
z-index: 3;
}
.sub-box-picture:hover .thim-button.style3 {
transform: translate(-50%,-50%) scale(1);
-webkit-transform: translate(-50%,-50%) scale(1);
-moz-transform: translate(-50%,-50%) scale(1);
-ms-transform: translate(-50%,-50%) scale(1);
-o-transform: translate(-50%,-50%) scale(1);
}
.sub-box-picture:hover .ciudades {
transform: translate(-50%,-50%) scale(0);
-webkit-transform: translate(-50%,-50%) scale(0);
-moz-transform: translate(-50%,-50%) scale(0);
-ms-transform: translate(-50%,-50%) scale(0);
-o-transform: translate(-50%,-50%) scale(0);
left: 50%;
position: absolute;
top: 50%;
visibility: hidden;
}
.thim-button.style3 {
background-color: #3080B2;
border-color: #3080B2;
color: #fff;
}
.thim-button.style3:hover {
background-color: #3080B2;
border-color: #3080B2;
text-decoration: none;
}
.thim-button {
border: none;
-webkit-border-radius: 0px;
-moz-border-radius: 0px;
border-radius: 0px;
font-size: 20px;
line-height: 36px;
padding: 0 20px;
display: inline-block;
}