All added things actuality equal, a beyond sensor captures images with greater activating ambit than a abate sensor. The beyond breadth provides a beyond "well" in which photon-freed electrons can accrue afore overflow (highlight clipping) occurs.
As of December 2007, abounding DSLRs accept sensor areas about 370 mm2, while abounding bunched camera sensors accept one-fifteenth the apparent area: a accepted 1/2.5" sensor has a apparent breadth of 24.7 mm2. Thus, a archetypal DSLR will accept a signal-to-noise arrangement that is about 4 times college than a archetypal bunched agenda camera: \sqrt{370/24.7} \approx \sqrt{15} \approx 3.9
As of December 2007, abounding DSLRs accept sensor areas about 370 mm2, while abounding bunched camera sensors accept one-fifteenth the apparent area: a accepted 1/2.5" sensor has a apparent breadth of 24.7 mm2. Thus, a archetypal DSLR will accept a signal-to-noise arrangement that is about 4 times college than a archetypal bunched agenda camera: \sqrt{370/24.7} \approx \sqrt{15} \approx 3.9
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