Canon EOS Digital Rebel T1i / 500D vs Pentax K-7: Low-Light Video / Movie Recording – Mike Perlman:
In low light, the Pentax K-7 did an admirable job of adjusting the Auto exposure, and we loved the ability to zoom in and out. However, noise levels were off the hook in extremely low light environments, but at least the Pentax K-7 provided a visible display. The Canon EOS 500D (Rebel T1i) could not even handle to low light whatsoever, so the Pentax K-7 took the edge there. We feel that the Pentax K-7’s HD video quality suffers from first-generation syndrome, but based on the quality of some of the camera’s top video clips, we can only expect great things in the future.