« on: March 04, 2012, 01:35:51 PM »
1. Even if the D800 has autofocus for video, will it work well? Reviews of the D7000 made it sound like it was useless. Sony with their translucent mirror technology seems to have the only useable DSLR video AF. I suspect power manual focus using the lens AF motor would be more useful.
2. The 5D Mk II used line skipping to capture 1920x 1080 video across the full-frame sensor. This led to all kinda of problems from a quality of video perspective. Tests done by shooting video of a resolution chart show it was only capturing around 720 lines of resolution, not 1080. Other problems were moire and rolling shutter artifacts while panning (though this has nothing to do with line skipping). The 5D Mk III rather than line skipping has the computing power to use the whole frame and resize down to 1080 on the fly as it compresses the video. This is supposed to resolved the first two issues. 8 channel read out from the sensor (faster capture of each frame) should fix the rolling shutter problem.
3. I was surprised at the price jump, however today on the Washington DC craigslist there is one D700 owner offering to trade for a 5D Mk II. I have listed my 5D Mk II and there are at least 4 others that have suddenly popped up since the 5D Mk III.
4. This camera is going to be a huge hit. Any Mk II owner who has used the 7D was jealous of the AF and overall speed of the camera. I owned a 7D first and then bought a used 5D Mk II. I was very frustrated with what I would call the usability of the 5D in situations where speed was necessary. Cycling through the AF points sucks as does switching from still sto video in a hurry when you have Live View set for stills mode. Also, more time is needed to ensure you achieve good AF lock on the 5D especially with some lenses. HOWEVER, the 5D Mk II destroys the 7D in image quality. This is what led me to sell the 7D as it just wasn't being used.
I think there have been a lot of people wanting a full-frame 7D and this is almost exactly what Canon has given us. It is not quite as fast at 6fps vs. 8fps, but the people that need that much speed can buy a 1D X.
The 5D Mk III at the same price would be an absolute no-brainer for every Canon owner. At $3500 and with the Mk II being continued, it's probably a tougher choice for a lot of people. If it will only be used in a studio, I see no reason for an upgrade. I occasionally shoot high-speed sports, but mostly walk around doing street photography. I want fast, but don't want the size/weight/cost of a 1DX. This seems like the perfect camera. I preordered immediately. It's a lot of money, but this seems like it could be the last camera I ever own.
I should add that I am looking forward to seeing the supposed improved image quality even though it's nearly the same resolution. The Mk II captures so much detail it's astonishing. The only reason I would ever want more is have more wiggle room when cropping post. I don't otherwise care for a D800 level of resolution. The sample images that have been release show a lot of noise when not at ISO 100. Reminds me of my 7D images. Also, that camera has a diffraction limit of f/8. That means images taken at f/8, f/11, etc. will have reduced sharpness compared to images taken at f/5.6 or wider.