i am new to photography so i am slow in composing, so is af c a better af for me or ap s? i am afraid by the time i focus & recompose, set my EV etc. the focus will long be unfocused. i m mostly shooting people. what is a good value for contrast, sharpness and saturation? is 0 fine? using portrait for photo mode currently. will vivid bring out the photo better? i have set my brightness for evf n lcd to -2 brightness and highlights to 250 5. as i always felt that the photo is too bright/over expose. is it approriate? assuming i want to do less post processing works, what will be a better set up. thank you.