בוגר פשוט סבך focal length distance פחות שגשוג משודר
What is Focal Length in Photography? - Focal Length Explained
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What is Focal Length in Photography? - Focal Length Explained
What Is Focal Length in Photography?
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Lens Selection Guide, Part 2 | 2018-12-01 | Quality Magazine
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Principal focal length: be careful
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The value of the focal length of the lens is equal to the value of the image distance when rays are (A) Passing through optical center(B) Parallel to the principal axis.(C) Passing