4. Optical: systems and elements
  5. Compound lens system
  6. Variable magnification

Hyoung-Won Kang

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Camera finder system

Photography – With viewfinder – Selective or adjustable viewfinder field
Patent

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Real image zoom finder

Optical: systems and elements – Compound lens system – Variable magnification
Patent

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Real-image variable magnification viewfinder

Optical: systems and elements – Compound lens system – Variable magnification
Patent

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