Recent Examples of focal length from the Web
The ideal lens focal length would be in the 400mm to 600mm range on a 35mm SLR, less on APC cameras with smaller sensors.
The lens was manually focused at infinity, zoomed to a 300 mm focal length, and the camera was set at f/10, 1/250 seconds and ISO-400.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'focal length.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of focal length
FOCAL LENGTH Defined for English Language Learners
Definition of focal length for English Language Learners
: the distance from the surface of a lens to the point of focus (sense 3)
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