A quick look at the page reveals "，EOS 400D使用APS-C尺寸（22.2×14.8毫米）!" followed by "是1.6倍". Looks like an APS-C, 22.2mm X 14.8mm sensor, 1.6x crop factor, as usual. Not to mention DIGIC II. Not such an amazing upgrade as far as I can tell.
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A quick look at the page reveals "，EOS 400D使用APS-C尺寸（22.2×14.8毫米）!" followed by "是1.6倍". Looks like an APS-C, 22.2mm X 14.8mm sensor, 1.6x crop factor, as usual. Not to mention DIGIC II. Not such an amazing upgrade as far as I can tell.