My dog doesn't like it either, it takes a ton of tries. From their perspective it's getting piece of metal in their face, since the concept of why one needs to look into a camera is lost on them - If I didn't know what a camera was I think it would be annoying too!
This is my dogs instagram and she almost always is looking slightly away from camera, lol https://www.instagram.com/sashabearphoto/
*Hang on gotta dog wrangle!*