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Published online by Cambridge University Press: 07 August 2017
We review the status of CCD photometry with emphasis on applications in projects that require considerable amounts of observing time at medium-aperture telescopes and at tasks complementing projects carried out at large telescopes. Associated problems of CCDs are discussed, together with unsuspected difficulties affecting millimagnitude accuracy mainly caused by pixel-size mismatch, cooling, data acquisition, non-linearity of response and improper standardization.