Spot Metering was the only worthwhile feature added to the 30D... The 1/3rd ISO stops were a flop, and it ended up that the lower added counts were showing more noise than their higher 1/2 stop counterparts... IE/ ISO 125 was showing more noise than ISO 200... The 20D will NOT hold you back, and if it does, you are of the standard of which someone will be paying you for photos, so you can afford to upgrade to a 1 series
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