Hi Guys I've a few questions about night photography. I'm using a nikon D7000 and was wondering if I should get a flash for my night photography. I'm into taking potraits people at night and was wondering if a flash is needed. If we increase the exopsure time without using flash, making the model stand there for like 8 seconds, will we be seen as unprofessional? I believe that with the long exopsure we'll be able to capture the beasutiful scenary lights as well but with flash the scenary light might not be that outstanding. I'm not sure if I'm on the right track, please guide me.