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Patent: Very small giant aperture zoom lens optical formulation | Canon Rumors


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Canon has revealed a reasonably attention-grabbing optical design patent for big aperture zoom lenses. The 2 designs on this patent are fairly attention-grabbing.

Canon’s objective on this patent

To offer a zoom lens having a brief whole size and a small dimension however having excessive optical efficiency, and a picture pickup equipment having the identical.

As you may see, these lens designs use the “reverse” zoom design like the unique EF 24-70mm f/2.8L USM. This most likely helps in lowering the size and dimension of the lens. As you may see, the picture peak adjustments when zooming out and in.

General size is sort of spectacular at 105.42mm (about 4″) on the vast finish. Understand that these measurements are from the picture sensor to the entrance aspect of the lens design.

Instance 1

  • Focal size: 28.84mm – 67.90mm
  • F-number: 2.91
  • Half angle of view: 32.68° – 17.67°
  • Picture peak: 18.50mm – 21.64mm
  • General size: 138.40mm – 105.42mm
  • Again focus: 10.97mm – 21.12mm

Instance 2

  • Focal size: 28.84mm – 60.00mm
  • F worth: 2.91
  • Half angle of view: 32.68° – 19.83°
  • Picture peak: 18.50mm – 21.64mm
  • General size: 132.38mm – 106.85mm
  • Again focus: 13.47mm – 23.82mm



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