USING CLOSE-UP LENSES
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Super Macro Underwater Photography - The Definitive Guide, Part 2B
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Optical Diopter Strength Explained – Focusers
What is a Diopter? - Lindsey Optics
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Understanding Dioptre & Magnification - The Daylight Company
The Split Diopter Lens Explained with Eye-Popping Examples
Define one dioptre of power of a lens. - YouTube
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Deep Focus: Diopters - The American Society of Cinematographers (en-US)
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