Results of three-color image-tube surface photometry obtained with the
1-m telescope at the Mount Maidanak Observatory (Uzbekistan) for the
galaxies NGC 1620 (UBV), 7292 (UVR), and 7743 (UBR) are reported. Anal
ysis of the two-color diagrams reveals star-forming regions of various
intensity in the galaxies. Rotation curves are used to construct mode
ls of mass distribution for NGC 1620 and 7292.