  The 4K$\times$4K CCD Imager is the first light instrument for the 3.6m
Devasthal Optical Telescope and is producing broad-band imaging observations of
many Galactic and extra-galactic sources since 2015-2016. Capabilities of the
CCD Imager are demonstrated recently through several publications using the
well-calibrated multi-band deep photometric results as expected from other
similar facilities globally. In this article, we summarize some of the recent
up-gradations made to improve the Imager, i.e., mounting the new filter wheel
casing, replacing stray light baffles and discussing the fringe pattern
corrections in redder filters. Some of the new science initiatives like
galaxy-embedded faint point sources including WR stars and the observations of
low surface brightness galaxy clusters are also discussed.
