  Here we show the preliminary results of a photometric study of low surface
brightness objects with $\mu_{g'}~\gtrsim~25$~mag/arcsec$^2$. These objects are
present in several fields obtained with GEMINI-GMOS, in the central region of
the Pegasus I group. We found that their photometric characteristics are
similar to the so-called dwarf spheroidal galaxies or to the ultra low surface
brightness galaxies.
