When you buy a digital camera it may have built-in memory. However, as in most cases, this memory usually does not hold a lot of images. So it would do you well to invest in a large memory card so you can hold more images. The most popular memory cards used in digital cameras includes:
• Secure Digital (SD)/MultiMediaCard (MMC): The most popular flash memory format used in digital cameras today is Secure Digital (SD). The price of these cards has come down in price dramatically. A 1GB SD card comes at a price tag of $35. SD and MMC cards are nearly identical on the outside but not on the inside. Be careful here, not all cameras can use SD or MMC. Consult the camera’s users manual to be sure.
• CompactFlash (CF): CompactFlash cards contain both memory chips and a controller. Most digital cameras can use up to 8GB with no problems. You will normally see two types of CompactFlash cards: Type I (3.3mm thick) and Type II (5mm thick).
• Memory Stick (MS): In 1999, Sony developed the memory stick. This stick came in memory sizes from 4MB to 128MB. The later memory sticks were made to hold up to 2GB.
• xD-Picture Card (xD): This is a new type of memory card that is the size of a postage stamp. It can store images up to 8 Gigs. These memory sticks are mainly made by Olympus and Fujifilm, the creators of them. You can get this type of memory in memory sizes from 16MB up to 1GB.