To be comfortable shooting manual, you will need to know what your necessary adjustments are. Though these settings are all numeric, there isnt some insane math equation that you need to do to find out what to dial.
I don't like showing a lot of my face in photos, so instead I create surreal and double exposure portraits. I've always loved double exposure portraits, I think it adds a certain 'edge' and uniqueness that can in lots of times, turn a plain photo into
iPhone SLR Mount - Forget about the fact that you're going to have to carry around a big ol' lens. The iPhone SLR Mount is here to give your iPhone access to Nikon or Canon lenses for supposedly awesome quality photos