Scalable post width, is this possibel

I am developing a theme, primarily for images and photo blogging, and I want to kow if it is at all possible to scale the width of the post (and the images contained within the post) depending on the users browser width? I know this is possible for background images, but is this possible for actual post images?

I am hoping to create something similar to this https://www.doublebygettyimages.com/

thanks