How many digital photos on a 5MP camera will fit onto a 512MB card?
That answer is going to depend on the picture quality or
compression you select. I suggest searching online for
manufacturer's specs on the camera in question. The manufacturer
will often provide a table that shows the number of files for
different settings. If you're not shooting in RAW or TIF mode, the
MB used per shot and shots per card will vary somewhat according to
image detail and sometimes the ISO setting as well. So what you get
will be a guideline.