In 2005,the market of digital cameras has been developing very quickly,the import tariff was remitted,many renowned brands were merged,the market competition became stiffer,the main stream of family-use DC entered the 500 pixels epoch,the newly emerged card DC market has been expanded successfully,the long focus technique became more ripened,high-end deluxe products persisted in a narrow space,the DSLR cameras market became more eye-catching etc.