Got an xt20 this year. Also besides the 18-55 kit lens I have purchased a 27mm, a 10-24mm, a 55-140. I just purchased a Lee filter kit with Big and Little stopper. Live in the Smoky Mountain area, so lots of good landscapes to photograph. Question. I understand I need to block light from coming through the view finder when using the filters. How do I do that, put it on LCD only?