With CCD's and CMOS sensors, the convention has been to measure them as fractions with 1 as the numerator. 1/2.7 inch would be slightly larger than 1/3 inch and slightly smaller than 1/2 inch. You can convert it to a number if the fraction confuses you (like it does me). 1/2.7-inch is .37 inch.
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What the heck is a "1/2.7-inch CMOS sensor"?
With CCD's and CMOS sensors, the convention has been to measure them as fractions with 1 as the numerator. 1/2.7 inch would be slightly larger than 1/3 inch and slightly smaller than 1/2 inch. You can convert it to a number if the fraction confuses you (like it does me). 1/2.7-inch is .37 inch.