Abstract
We continue in this work the study of nearby spiral galaxies started with NGC 628 (Natali 1992, here- after Paper I). A sample of seven face-on spiral galax- ies has been selected to obtain images in the U , B, V , R, I bands using a CCD detector at the 90 cm Schmidt telescope at Campo Imperatore Observatory. Surface pho- tometry using a dedicated software is used to derive both the surface brightness radial proles in each band and the colour indexes. The radial disk scalelengths obtained from the radial proles show a trend with wavelength which seems to highlight a huge presence of dust in the inner disk zone. For two galaxies of the sample the presence of dust is conrmed by the radial trend of colour in- dexes. The presence of galactic infall already detected for NGC 628, is conrmed, from the bluish (B V ), also for NGC 3184.
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