Adding a second "Featured Image" to custom content types

I have a type of content that uses the standard Wordpress "Featured Image," which I use for a slider, but I'd also like to have a "Banner Image" for the most recent post, which will appear outside of the slider as a large graphic. I can create a custom text field and just enter image URLs, but I'd like to be able to use the Media Library's streamlined upload and picker. Is this something that is possible?