Ursa Minor (cave) Ursa Minor (cave) Ursa Minor Cave is part of Sequoia National Park, a naturally formed system of caves in California's Sierra Nevada. The cave was discovered in August 2006 by four cave explorers from the Cave Research Foundation who found a softball-sized hole on a cliff face in the mountains. After widening the hole to allow for human entry, the explorers discovered one of the most spectacular caves in the western United States. The cave has since been named "Ursa Minor," because of the large bear skeleton found in the cave. The cave was featured in the September 2007 issue
Blackmagic URSA camera onto the URSA. The Broadcast model uses an optimized sensor for broadcasting in Ultra HD, as well as a specialized B4 lens mount and a neutral-density filter wheel on the body. The Blackmagic URSA Mini is a variant of the URSA camera. The 4.6k variant was released on March 17, 2016. It has a smaller form factor and loses some functionality and features over the URSA, losing the secondary 5" touchscreen, global shutter on the 4.6k variant and other features. However, it does ship in 4K and 4.6K specifications, and ships in EF and PL mounts. The Blackmagic URSA