Canon EOS-1D Mark IV

Opinion: Great build, phenomenal AF and general speed of operation. IQ and resolution fit for any application. The best action and wildlife body IMO.

Opinion: Just wondering how come some idiots they don't even touch this camera and than just left some bull shit and rating this camera one star.

Too expensive.... not worth 5000, bad image, too much plastic, Nikon is better.......

Just want to say this is a really good camera for me (the real user) and those people if you love Nikon or don't like Canon, please just walk away.

I am not going to leave much opinion because I saw a lots review those I want to say. I jump from 50D to 1D4, I really like the quality and the image of this camera. That made my lens release their potential. I love it.

Opinion: I already had a 1Ds and a 1Dsii, both of which I'd used for sports photography but bought this because of its faster frame rate. I've used it extensively for running photography. I prefer the new interface, like the big LCD screen and the general handling. The autofocus is very good and I've tweaked it as recommended, but I get better results with one AF spot rather than several, no matter how I tweak it, so I stick to one. With multiple AF points the focus tends to fly around and sometimes onto the background. When I use one AF point it stays on what I want and I get about 90% of shots acceptably sharp as long as I do what I'm supposed to.
The IQ is very good. At base ISO it's in fact stunning. I've done a proper comparison with the 1Dsii and find that they have identical resolution but that this has a stop advantage with regards to noise. The output from the 1Dsii may be slightly sharper. Hard to call.
The battery life is incredible. I'm getting well over 2000 shots per charge. Also, the battery meter appears to be reasonably accurate. I've not had to clean the sensor at all, which is good.
I've had the camera several months and have shot more than 10,000 shots.
While the video can be made to work it's awkward and in my view highly impractical compared to a cheap high-definition camcorder which I've since purchased. The AF lets it (and similar DSLRs) down.
I didn't buy this to do video on it, so that's all right.

Down side?
At VERY low light levels the AF will not work. I think that others have commented on this.

Opinion: Bad images

Opinion: Not for 5000

Opinion: Overall D3s much better

Opinion: Good, but not better than 7D. Same quality output.

Opinion: This is great camera only for street profies. Good for using with tele-zooms and long primes. High ISO good upto 3200 (very usable 6400). Much better camera in every aspect than 7D. But, if want truly great images, save money and choose between Nikon 3Ds or Canon 5D MII.

Opinion: Feels like minor upgrade but is more. My review on my teaching blog: http://blog.michaelwillems.ca/2010/02/08/1d-mk-iv-hands-on-impressions/

Mmm. Seems no links allowed? Well then google my name.