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EFL
(redirected from Effective focal length)

    Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.02 sec.
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EFLEnglish as a Foreign Language
EFLEffective Focal Length
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EFLEdited for Length
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EFLEnvironmental Fund for Lebanon Project
EFLEducation for Life (various organizations)
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The total amount of light reaching the film plane changes with the duration of exposure, aperture of the lens, and, and the effective focal length of the lens.
Photography Tips by jessie thomas / Arts, visual and performing community
The interposition of an achromatic binocular objective lens at half the focal length produced a back focus of 160mm--the system now has a effective focal length of 336mm at F:3.
Discovery of a new refractor system by Wall, John / Journal of the British Astronomical Association
7x wide-angle lens will reduce the effective focal length of your lens by half or three-tenths, respectively.
Accessory Lenses for Digital Cameras by Michalle Law / Computers and Internet community
 
 
 
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