The Dragonfly Telephoto Array, composed of 48 individual Canon telephoto lenses operating together as a single telescope, is an innovative approach to low surface brightness imaging. Sub-nanometer coatings on each optical element reduce scattered light from nearby bright stars and compact galaxy centers -- typically a key obstacle for integrated light observations -- by an order of magnitude, and Dragonfly's large field of view (2 x 2.6 degrees for a single frame) provides a large-scale view of galactic stellar halos and satellite systems. Using extremely deep (>30 mag/arcsec^2) optical imaging in g and r bands from the Dragonfly Nearby Galaxies Survey (DNGS), we have characterized the stellar halos of a sample of nearby luminous galaxies. I will present measurements of the stellar halo mass fractions of an initial sample of Milky Way-mass spiral galaxies from the survey, and discuss these in the context of the assembly histories of individual galaxies. Finally, I will provide an overview of ongoing and upcoming Dragonfly projects which range from discoveries of extended low surface brightness galaxy disks, to characterizations of intra-group and intra-cluster light, to the detection and study of ultra diffuse galaxies and faint satellite galaxies both within and outside of clusters.