Frequently asked question on how to get better pictures.
Yes, auto-focus could take a wrong focusing assumption, if there are obstructive objects or simply no object between or behind the subject and the camera. Better quality auto-focus feature will use multiple points to compute a focus. The best auto-focus feature will use a detector to trace the movement of your eye pupil such that it knows where your subject is located.
How do I overcome the auto-focusing trouble?
Could an automatic exposure camera be fooled?
How can I compensate the in-correct automatic exposure?
Is manual camera better than automatic camera?
What is the B speed of a shutter?
This picture was taken at night in Harvard Square using B speed with flash. The total
exposure time was about 1 second. If it was taken without the flash, the kids will be all
dark shadow. If it was using normal shutter speed with flash, the background will be all
in the dark.