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Optical basics
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Lens Calculator article from Finepoint Broadcast Ltd
Focal Length Calculator
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Object Dimension, Object Distance, & Focal Length | Canon U.S.A., Inc.
Focal length calculator
Focal Length Calculator | Edmund Optics
The power of lens is, `-2D`. Calculate its focal length. - YouTube
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Use the following ray diagram, Fig. to calculate focal length of lens `L_2` - YouTube
Focal length calculator
Focal Length Formula & Examples | How to Calculate Focal Length - Video & Lesson Transcript | Study.com
Focal Length Lens Calculator - Ricoh International B.V.
Focal Length Calculator and How Embedded Cameras Work- Arducam
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How to Calculate the Focal Length of a Lens Given Index of Refraction | Physics | Study.com
