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The name of a 1" digital sensor should more accurately be read as "one inch video camera tube equivalent" sensor. Current digital image sensor size descriptors are the video camera tube equivalency size, not the actual size of the sensor. For example, a 1" sensor has a diagonal measurement of 16 mm. [26] [27]
The latest Leica Leitz and Sharp Aquos R series phones do qualify because, despite using only 94% [b] of their 1.0-type sensors [2] [3] (with 4:3 aspect ratio), they maintain the same crop factor (2.7) and diagonal (1″) as a 1.0-type sensor with 3:2 aspect ratio, since that is the image circle for which their lenses were originally designed.
While there were larger CCD sensors made for interchangeable-lens cameras, such as the Leica M9, CCD sensors in fixed-lens cameras maxed out at 2/3″ (1/1.5″). Premium compact cameras of the time contained sensors around 1/1.7″ in size, whereas entry-level models used 1/2.3″ sensors or smaller. [37] [38] [39]
Sensor size Optical zoom Focal length [a] Aperture ... Each of the following models contains a 1/2.3-type ("1/2.3-inch") image sensor with a crop factor of 5.6. Model ...
The result is expressed in inches and is usually (but not always) rounded to a convenient fraction. For instance, a 6.4x4.8 mm sensor has a diagonal of 8.0 mm and therefore an optical format of 8.0*3/2 = 12 mm, which is expressed as 1 ⁄ 2 inch in imperial units. The reason it is expressed in inches is historical, dating back to the early days ...
The most commonly used definition of crop factor is the ratio of a 35 mm frame's diagonal (43.3 mm) to the diagonal of the image sensor in question; that is, = /. Given the same 3:2 aspect ratio as 35mm's 36 mm × 24 mm area, this is equivalent to the ratio of heights or ratio of widths; the ratio of sensor areas is the square of the crop factor.
Sensor size (Diagonal) Unit cell size Sensitivity (typical value F5.6) Sensor saturation signal (minimum value) Output Subpixel layout Release Date ICX249 [1] 752 x 582 0.44 MP 8.0 mm 1/2" 8.6 μm x 8.3 μm 1100 mV 900 mV Adjacent field line sums Cy Ye G Mg about 1999 ICX445 [2] [3] 1296 x 966 1.25 MP 6.0 mm 1/3" 3.75 μm² 460 mV 350 mV
Sensor size Optical zoom Focal length [a] Aperture ... Each of the following models contains a 1/2.3-type ("1/2.3-inch") image sensor with a crop factor of 5.6. Model ...