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What is a focus scale?

Updated: 4/28/2022
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9y ago

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The focus scale is a type of focusing system that was used by most of the inexpensive cameras in the 1940s and 1950s. The focus scale is also called the zone focus or the scale focus.

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What is the classification scale used to describe the depth of origin of earthquakes?

shallow focus Intermediate focus Deep focus


When is rating of earthquake damage at a particular location?

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