To be comfortable shooting manual you will need to know what your necessary adjustments are. Though these settings are all numeric, there isn't some insane math equation that you need to do to find out what to dial
As a professional photographer, Angel McKenzie has two high end digital SLR cameras. The Canon EOS Mark iii is her favorite. Over the years, she has stayed with Canon, and has a nice collection of lenses that can be used on either of her cameras.