There is no difference. Photo.
un appareil-photo
I like you photo : j'aime ta photo (that's) like your photo : (c'est) comme ta photo
une séance de photos
The correct spelling is "photo."
La photo ("the photo") is feminine in French.
no. Photo is the same in French and English
The word "photo" is feminine in French.
cette photo
The French word "photo" is feminine.
Photo couleur
a photo -> une photo a photograph -> une photographie
The word "picture" is feminine in French. It is "une photo" (feminine) in French, not "un photo" (masculine).