4. Optical: systems and elements
  5. Compound lens system
  6. Variable magnification
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Real-image variable magnification viewfinder

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

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Variable magnification finder

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

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Variable magnification laser imaging system

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

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Variable magnification viewfinder

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

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Variable magnification viewfinder optical system

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

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Wide-angle variable magnification viewfinder

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

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Wide-range, wide-angle compound zoom with simplified zooming...

Optical: systems and elements – Compound lens system – Variable magnification
Reexamination Certificate

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