I was trying to send 384 photos from iPhone 5s to iPad Air, but photos app screen goes off. So couldn't send any photo to iPad air.
There is no documented limit, but I would try with a smaller number (I.e. 100 photos, or even 50) since iPhone 5S and iPad Air has a limited amount of ram available.
Thanks
I selected 125 photos at once and sent it to iPad successfully.