True or False: A builder's level is used to focus on a large target and the field of vision is unlimited.

A builder's level is an optical instrument used primarily to establish a horizontal plane and to level surfaces accurately. When using a builder's level, the field of vision is not unlimited; it is structured to focus on a specific target within a limited range. The level assists in determining elevation differences across a distance, but it relies on the line of sight, which is constrained by factors such as terrain or obstructions. This makes the statement about the field of vision being unlimited incorrect, clarifying why it's accurate to assert that the answer is false. In practice, builders and pipe fitters utilize levels to ensure that installations are precise and meet specified grades and alignments.