  We present deep, large area B and r' imaging for a sample of 49 brightest
cluster galaxies (BCGs). The clusters were selected by their x-ray luminosity
and redshift to form two volume limited samples, one with mean redshift ~ 0.07
and one at a mean redshift ~ 0.17. For each cluster the data cover 41' by 41'.
We discuss our data reduction techniques in detail, and show that we can
reliably measure the surface brightness at the levels of mu_B ~ 29 and mu_r' ~
28. For each galaxy we present the B and r' images together with the surface
brightness profile, B-r' colour, eccentricity and position angle as a function
of radius. We investigate the distribution of positional offsets between the
optical centroid of the BCG and the centre of the X-ray emission, and conclude
that the mass profiles are cuspy, and do not have extended cores. We also
introduce a method to objectively identify the transition from BCG to extended
envelope of intra-cluster light, using the Petrosian index as a function of
radius.
