Disclaimer:

Use of construction specifications, plans, items, lists and/or advice contained herein is the sole responsibility of the reader, who does so at his/her own risk. Some material is taken from articles in trade magazines and instruction manuals produced in the 1930s and 1940s, and were originally intended for theatre personnel. Therefore, particular references or language may be unfamiliar to some readers and further research is encouraged to those individuals.

Some mathematical formulas, screen dimensions and demographics referenced herein may be contrary to current engineering practices, projection formats or established economic facts, respectively. While the information presented is culled from actual field experience and my library of technical information, I cannot be held liable for mistakes, omissions, individual interpretation or results.

Tim Reed