Most portable high definition photography and camcorder equipment use Secure Digital High Capacity (SDHC) memory cards and having the right type memory makes a huge difference. The faster your memory card can write, the more pictures you capture before the buffer is full and less waiting before another picture can be captured. As you can guess, the time you least want your buffer to be full is going to be when that picture perfect moment passes before your eyes. Before you know it, it is gone and you're still waiting for the buffer to clear.