Assertion: tripod's ball head | /r/HasProperty | the most common type
Facets:
Source sentences:
text: Ball head: The most common type, this head allows you to rotate the camera into a position that works best for what youre shooting.
text: Ball heads and three-way heads are the most common types.
text: Ball heads are the most common type of head that most tripods come with, but pan-tilt heads are another popular choice.