4. Photography
  5. Exposure control system responsive to focal length
  6. Control of full open aperture value
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Camera having an aperture controllable shutter

Photography – Exposure control system responsive to focal length – Control of full open aperture value
Patent

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Camera with diaphragm restriction clearing section

Photography – Exposure control system responsive to focal length – Control of full open aperture value
Reexamination Certificate

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Diaphragm device having full-open aperture diameter electrically

Photography – Exposure control system responsive to focal length – Control of full open aperture value
Patent

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Lens control device

Photography – Exposure control system responsive to focal length – Control of full open aperture value
Patent

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