The number of photos that fit onto a 512 MB memory card depends on the quality of the photographs when recorded. Estimates vary between 83 very high-quality pictures and 552 rather low-quality pictures.
The number of pictures that can be stored on the card is determined by the size of each photo file. The file size in turn determines the quality of the resulting photo. The file size is set by the user of the camera, with most consumer-level cameras having pre-set choices ranging from small to medium and large. For the best image quality, some cameras allow users to choose a RAW format, which takes up the most space on a memory card. Experts recommend bringing a spare memory card or purchasing one with larger capacity when shooting at the highest settings.