.col-sm-6 {
  padding: 10px 10px;
}
.photos img{
  height: 280px;
  width: 255px;
  transition: 0.5s;
  border: 2px solid green;
}

.photos img:hover{
  filter:scale(100%);
  transform: scale(1.1)
}

.pics img{
  transition: 0.5s;
}

.pics img:hover{
  filter:scale(100%);
  transform: scale(1.1)
}