Thanks to digitization efforts by libraries around the world, images of early manuscripts are becoming increasingly available for free online. This makes them more accessible and goes beyond the many physical limitations that are often associated with these materials: fragilility, careful handling, travel, special permissions, etc...
Here are links to several collections, including one that is housed here at Ohio Wesleyan.
Gaston Phoebus, Livre de la Chasse.
Brittany, ca. 1430-1440
LA, Getty, Ms. 27, fol. 81v