I have one of the MP721c's, and the colour wheel is very slow. If you glance at anything quickly you see fantastic rainbows if your eyes are sensitive to things running around 60hz -- the price is pretty much the same, so I would suspect the 622c would use nearly identical parts.
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I have one of the MP721c's, and the colour wheel is very slow. If you glance at anything quickly you see fantastic rainbows if your eyes are sensitive to things running around 60hz -- the price is pretty much the same, so I would suspect the 622c would use nearly identical parts.