The following will list all attachments with a media type of image/jpeg and link directly to the image:
[[list-related-attach type="image/jpeg"]]
This should show the same thing, but link to the attachment page:
[[list-related-attach type="image/jpeg" link_to="attachment"]]
and here we test the orderby attribute:
[[list-related-attach type="image/jpeg" orderby="title" order="ASC"]]