Language:
    • Available Formats
    •  
    • Availability
    • Priced From ( in USD )
    • Printed Edition
    • Ships in 1-2 business days
    • $50.00
    • Add to Cart

Customers Who Bought This Also Bought

 

About This Item

 

Full Description

This standard specifies the lens markings, focal length tolerances, mounting diameters, mechanical factors in mounting additional lens adapters to lenses, and the preferred value steps in focal lengths for lenses used in 35- and 70-mm motion-picture projectors . (Focal length referred to in this standard is the equivalent focal length, commonly known as EFL.)This standard also specifies the limiting or maximum available space for projector lens mounts where lenses of varying focal lengths and designs and attachments thereto are used.