http://www.nikonchat.com/canon-vs-nikon-autofocus/

Nikon D90 vs. Canon EOS 500D?
I'm thinking about my first DSLR, and attending photography school looking at the D90 and 500D What are the pros and cons of these 2 cameras, will also make the recording in high definition, d is the d90s 720p movie mode is better than charging mode 720p? IMO the 1080p via the barrel is not usable due to this slow frame rate, but I learned that the fees can autofocus while recording, while the D90 can not. I read that the D90 has more focus points and better, faster during the filming of images focused on comparison with the 500D … I'm in a shooting in low light, long exposures, sunsets, beaches, animals, nature, plants, people, etc. ..
Take a SD with you in a camera store and test the two chambers. Try then your ISO higher and lower, with the color balance set for the type lighting in the warehouse and in the car. Also try some video shots. When you get home, see the results of its large computer monitor and then decide Frankly yourself, if you are so interested in a video camera, you need to buy a video camera and take it. What does not seem to know, is that when a video recording, manual focus method is tested and used by Hollywood, in fact, they pay good money to a person called the "focus puller"
Nikon D300 and Canon 40D