问一款Canon的数码相机 CANON Digital Ixus 400 (4MegaPixel) -Compact Flash I -3x Optical zoom, 3.6x Digital zoom -ISO settings Auto,50,100, 200, 400 -Video Clips of up to 3mins -16MB Compact Flash bundled -Supports Exif 2.2 print SGD $799 这个价钱是贵还是合适啊？谢谢解答。