mafoo wrote in post #14316350
...I am almost ready to make the switch, but before I do, I would like to hear from you guys as to why you think it would be a bad idea. I mostly want this kind of feedback, to help me see something I might have overlooked...
The D800 has a great sensor, esp. regarding low ISO dynamic range. However a camera is more than a sensor. How important specific features are varies with each photographer and their shooting style.
The 5D3 has three different silent shutter modes and can shoot 3 fps continuously with phase detect AF, or 6 fps continuously in Live View mode. The D800 has a single more rudimentary silent shutter mode that works for single shots. If you shoot in quiet venues, a capable silent shutter mode is a big deal.
The 5D3 flushes its buffer to CF card very fast. The D800 is a lot slower. This was illustrated in The Camera Store review, where the professional photographer evaluating both said of the D800: ""...the buffer is very slow compared to the Canon...with the Nikon it's whistle a merry tune as it empties the buffer..."
In the test video at 07:00, you can clearly see the D800 struggling to flush its buffer. After they talked a while about how slow the D800 was, the video finally cut away, and it still wasn't done flushing: http://www.youtube.com/watch?v=4W9EeDCaVFM
The 5D3 has much less noise than the D800 in high ISO video. This may not be important for everyone, but it's a significant difference: http://vimeo.com/40113110
They are both great cameras and it's fair to say the D800's sensor generally improved more than the 5D3 compared to the preceding models. The D800 also has a more comprehensive metering system, 91k pixels with face and scene detection.
When I shot Nikon, I liked their Capture NX2 raw conversion/editing program -- once they finally made it 64 bits and somewhat stable. You use an entire camera ecosystem, not just the body & sensor. This includes various lenses, software, 3rd party information, etc. Changing your entire camera ecosystem based on the sensor in one particular body (which is often replaced periodically) shouldn't be a cavalier decision.