This is topic 1.66 Aspect Ratio in forum Film-Yak at Film-Tech Forum ARCHIVE.
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Posted by Mike Schindler (Member # 1309) on 09-20-2002, 01:19 AM:
Just a quick question. Is the 1.66:1 Aspect Ratio actually 1& 2/3 (or, 1.6666666) or do the first 2 digits after the decimal just happen to coincidentally be 6?
Posted by Leo Enticknap (Member # 534) on 09-20-2002, 03:42 AM:
Unless you use an electron microscope to cut aperture plates, I can't see too many people worrying about the difference... 
Posted by Michael Brown (Member # 890) on 09-20-2002, 08:36 AM:
Isn't it around 1.6666666666666666666666666666666666666664:1 
Posted by John Pytlak (Member # 331) on 09-20-2002, 08:43 AM:
Standard SMPTE 195 specifies the 1.66:1 aspect ratio as having a projectable image area of 0.825 x 0.497 inches (20.96 x 12.62 mm). The 0.825 is a nominal dimension, the 0.497 is a reference dimension, so tolerances aren't specified.Standards may be purchased from the SMPTE:
http://www.smpte.org/smpte_store/standards/
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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
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Posted by Evans A Criswell (Member # 381) on 09-20-2002, 01:48 PM:
quote:
Isn't it around 1.6666666666666666666666666666666666666664:1
Only if you use one of the original Pentium processors from Intel!
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Evans A Criswell
Huntsville-Decatur Movie Theatre Information Site
Posted by Mike Schindler (Member # 1309) on 09-21-2002, 12:33 AM:
Thank you, John. That answers my question.