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I don’t get that. The existing flat sensors don’t change curvature as focal length changes?

• sudosysgen 6y ago
  That's because current lenses correct field curvature so that the image plane is flat. This takes extra glass and can degrade image quality. If you could have a sensor with the correct curvature for the focal length of the lens, you don't need to correct field curvature anymore, which means that you need less glass and have higher quality. If you have the wrong curvature for the focal length, some field correction will still be required, which defeats the advantage. In the real world, it's even more than just focal length that changes the required curvature.
  • foo_barrio 6y ago
    Will it defeat the advantage or lessen it? For example, some people still need glasses after LASIK but still opt for it since they get end up with needing weaker lenses.
• giuliomagnifico 6y ago
  No, absolutely. The sensor is flat and when you change the focal length, the sensor gets the same “light/illumination”. That is the plus of a curved sensor: better image/photo at the border of the frame because there is always the same distance between the lens and the sensor.