U can prefocus at that particular spot where the light shines down, AF lock and wait for the unsuspecting lady to walk by and snap it- A telephoto would be discreet. I would use manual exposure and get the desired settings before stalking. As for the bokeh, a low F stop would help single out the subject from the background.
Camera Mode: A or M (just use A if you're not comfortable with M)
Metering Mode: Spot
White Balance: AWB
ISO: Lowest possible
AF Area: Spot
Drive Mode: Continuous / Burst
(** Alpha users, turn DRO off.)
- Pick places with shaded areas with streaks of sunlight peeping through anywhere or anything (i.e. building gaps, through the leaves, windows, etc) for subject isolation.
- Do test shots first. If the subjects are too bright, lower down your EV until you get the desired effect.
- Camp, camp, and camp. Sit on one area for hours if you have to.
- Use burst mode. There's a reason why it's there.
Bump up Blacks and apply vignetting to isolate the subjects a wee bit more. CS4 Camera Raw is superb for applying lens vignettes.
Enhance the warm tone through CS4 by bumping up red, orange and yellow to taste.
High pass filter to sharpen the images.
Hope my tips help.