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Definition of: focal length

Optics
The distance from the second principal plane of a lens or mirror to the point where rays from a distant object converge. Also focal distance.

Most often used phrases:

longer focal length
long focal length
lens focal length
short focal length
focal length lenses
focal length f
equivalent focal length
shorter focal length
focal length lens
effective focal length
fixed focal length
focal length multiplier
focal length range
variable focal length
focal length distance

'focal length' used in domains:

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focallengthphotos.com
focallengthdesigns.com
focallengthfilms.com
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focal-length.com

Statistical data

"focal length" has the frequency of use of 0.0001% on en.wikipedia.org.

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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