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    • photographyknowhow.com
      M athematical formulas are used that take into account the size of the sensor, or image area, and its distance from the center of the lens to determine the precise number of mm of each focal length. The focal length of a normal lens is equal to the diagon
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日期:2026-04-22
M athematical formulas are used that take into account the size of the sensor, or image area, and its distance from the center of the lens to determine the precise number of mm of each focal length. The focal length of a normal lens is equal to the diagon...