I have owned or used the full series of Canon 5D DSLRs (Mark I through Mark III). I have also owned or used all of the Canon 1D DSLRs (Mark I through Mark IV).
A little less than a year ago, I got rid of my 5D Mark III and bought the 6D (with the 24-105mm f/4.0L IS lens which I had owned in the past). The first thing I shot with it were these two series: Saturday at Lake George, New York (June 2013) and 2013 Elvis Festival, Lake George, NY).
I was pretty knocked out by the results. The 24-105mm f/4.0L IS in conjunction with the 6D gives really sharp results. I did notice a slight delay in its autofocus performance, but the focus was still able to lock in–even on moving targets–in most cases.
The silent shutter setting has really come in handy for both street photography and paid event photography where I need to be very quiet (e.g., at poetry readings).
The image quality, even at high ISOs, is as good as the more expensive 5D Mark III.
In short, I would recommend the 6D to anyone looking for a full frame Canon DSLR if you’re not shooting anything as fast-moving as most sporting events or car racing. It’s excellent for photographing outdoors or relatively slow-moving (or non-moving) subjects indoors–e.g., a couple moving down a relatively dark church aisle.
The Body Only 6D is $1900, but I think buying the kit and selling the lens if you don’t need or want it is a significantly better deal.
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