#slideshow7 .slick-list .slick-slide {
  opacity: 0.2;
  -webkit-transition: opacity .5s ease-in-out;
  -moz-transition: opacity .5s ease-in-out;
  -ms-transition: opacity .5s ease-in-out;
  -o-transition: opacity .5s ease-in-out;
  transition: opacity .5s ease-in-out;
}
#slideshow7 .slick-list .slick-slide.slick-active {
  opacity: 1;
}