  We propose an improved method for the atmospheric extinction reduction within
optical photometry. Our method is based on the simultaneous multicolor
observations of photometric standards. Such data are now available within the
modern wide-field sky surveys and contain a large amount of information about
instant atmospheric conditions. So, it became possible to estimate the
extinction parameters on the basis of a quite short observational dataset and,
hence, to trace the rapid stars twinkling accurately. Having been developed for
a new MiniMegaTORTORA observational system, the proposed method can be adopted
for a wide range of modern observational programs.
