The Making of an HDTV Lens - PBS
The Making of an HDTV Lens - PBS
The Making of an HDTV Lens - PBS
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Difference between<br />
Full Size Studio <strong>an</strong>d Portable ENG <strong>Lens</strong><br />
Full Size Studio<br />
• Primary consideration is highest overall<br />
Imaging Perform<strong>an</strong>ce<br />
• Large glass elements used:<br />
• To elevate optical sensitivity<br />
• Facilitate tighter control <strong>of</strong> surface toler<strong>an</strong>ces<br />
for highest perform<strong>an</strong>ce<br />
• More glass elements deployed:<br />
• To provide more design degrees <strong>of</strong> freedom<br />
to achieve lower monochromatic <strong>an</strong>d<br />
chromatic aberrations<br />
• Weight rapidly increases<br />
• Not a signific<strong>an</strong>t consideration with full studio<br />
cameras<br />
• Typical studio lenses weigh in between<br />
45 <strong>an</strong>d 50 lbs<br />
ENG Portable<br />
• Primary consideration is lowest<br />
Size <strong>an</strong>d Weight<br />
• Smaller glass elements are used:<br />
• To signific<strong>an</strong>tly curtail size <strong>an</strong>d weight<br />
• Fewer glass elements deployed:<br />
• To reduce overall size <strong>an</strong>d weight<br />
• Necessary compromises made in<br />
aberration control<br />
• Weight is tightly controlled<br />
• In the region <strong>of</strong> 4.0 lbs for ENG<br />
• In the region <strong>of</strong> 6.0 lbs for<br />
EFP
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