Hi! Check out the Face Image Meta-Database (fIMDb): https://cliffordworkman.com/resources/
The fIMDb includes info or estimates on: number of photo sets per source (and numbers of neutral and other sets — e.g., facial emotions), number of subjects per source (with approximate sex distributions), total number of images, approximate number of viewpoints, whether the sources includes photos from more than one ethnicity, whether it includes more than one age group, whether meta-data are available, the photo category (e.g., posed, wild), the reference(s) for the source (e.g. DOIs). I hope this will aid others interested in conducting research on responses to faces.