Canon early Wednesday launched its first-ever entry DSLR with HD video in the form of the Rebel T1i. The 15.1-megapixel camera uses the newer DIGIC 4 chip to record either full 1080p video at 20 frames per second or 30 frames per second at 720p, outpacing Nikon's D90 in terms of both resolution and price. Aside from the 1080p frame rate limit, the T1i has the same image setting adjustments as th
