Originally posted by D1N0 Both fingers are on top of the camera. Try putting your index finger on the top screen as if it is a touch screen en you middle on the shutter. It does require a two handed grip to be comfortable.
This will make it difficult to change focus point when following a subject using a long lens, unless you support the lens with something else than you hand.
You need to have your finger like 5 cm apart and also be able to move you index finder very precise.
I find this very hard to do even if supporting the camera with both hands.