  We continue our survey for magnetic chemically peculiar (CP2) stars in
galactic open clusters to shed more light on their origin and evolution. To
study the group of CP2 stars, it is essential to find these objects in
different galactic environments and at a wide range of evolutionary stages. The
knowledge of open clusters ages and metallicities can help to find a
correlation of these parameters with the (non-)presence of peculiarities which
has to be taken into account in stellar evolution models. The intermediate band
Delta a photometric system samples the depth of the 5200A flux depression by
comparing the flux at the center with the adjacent regions with bandwidths of
110A to 230A. It is capable to detect magnetic CP2 and CP4 stars with high
efficiency, but also the groups of (metal-weak) lambda Bootis, as well as
classical Be/shell stars can be successfully investigated. In addition, it
allows to determine the age, reddening and distance modulus with an appropriate
accuracy by fitting isochrones. From the 1677 observed members of the eight
open clusters, twenty five CP2 and one Ae stars were identified. Further
nineteen deviating stars are designated as questionable due to several reasons.
The estimated age, reddening and distance for the programme clusters were
compared with published vales of the literature and discussed in this context.
The current paper shows that CP2 stars are present continuously in very young
(7Myr) to intermediate age (500Myr) open clusters at distances larger than 2kpc
from the Sun.
