Ursa Major but to avert the tragedy, Jupiter turns Arcas into a bear too and puts them both in the sky, forming Ursa Major and Ursa Minor. Callisto is Ursa Major and her son, Arcas, is Ursa Minor. In ancient times the name of the constellation was Helike, ("turning"), because it turns around the Pole. In Book Two of Lucan it is called Parrhasian Helice, since Callisto came from Parrhasia in Arcadia, where the story is set. The Odyssey notes that it is the sole constellation that never sinks below the horizon and "bathes in the Ocean's waves", so it is used
Blackmagic URSA Mini Pro, the most recent variant of the URSA camera, was released on March 2, 2017. Compared to the URSA Mini, it adds an internal neutral density wheel, shoulder-accessible controls, and a secondary 4" touchscreen, and ships only in a 4.6K specification. Its most unique feature is a user-interchangeable lens mount. The camera ships with an EF mount, and at release time, PL and B4 mount modules were available for purchase. The Blackmagic URSA Broadcast, the most recent variant of the URSA camera, was released on February 1, 2018. While not an URSA "Mini", the Broadcast uses the same platform