Anybody looking at spending two grand on camera gear (and at that only a body and 1 lens) is looking for something good and believe me this pack delivers.
The 5D is one hell of a camera. There's no other way to describe it. Photos from this camera look so good straight from the camera it's almost unbelievable. Image resolution is simply excellent and of course the benefits of having a full frame sensor mean your lenses do what they say on the barrel!
The body itself feels substantial - much more so than something like a 400D. The 5D body also has a lot of metal construction so should be hardier than the plastic bodies of the cheaper entry level DSLRs. It's also bigger enabling a good grip.
The first thing you will notice if you're upgrading from a crop sensor DSLR is the awesome viewfinder. Having a full frame sensor allows the camera to have a larger mirror and consequently you get a much bigger and easier to see picture through the viewfinder. This really aids composition as it simply allows you too see more clearly what you're doing.
This camera, being aimed at enthusiasts and pros, doesn't have the same range of modes as the 400D as I expect the designers of this camera figure anyone shelling out this much will know what they're doing so what you get is Av, Tv, B, P and a full auto for lazy moments.
ISO ranges from 100 - 1600 (50 and 3200 are added with the ISO expansion turned on) and the camera produces stunning results at higher ISO values with much less noise than my 400D at the equivalent setting. Coupled in with the IS lens in this pack you have a formidable package enabling you to get fantastic shots in poor light you simply could not get with other equipment. I have personally achieved beautifully sharp images at 1/8 of a second hand held at 98mm zoom.
There's so much on this camera it's hard to condense down for the purposes of this review.
The screen is clear and image review is fast. Navigation is achieved with a wheel at the back for scrolling through menus and settings. It's quick; the only thing slowing you down is the wealth of options available to scroll through! There's also a little joystick for moving around zoomed in images on the screen. Camera information is displayed on a mono lcd on the top of the camera leaving the larger LCD screen off most of the time - probably saving a lot on battery life.
The list of custom functions is extensive and includes mirror lock up, shutter curtain sync, noise reduction, exposure level increments to name but 4 of the 21.
Continuous shooting speed is fairly slow at 3fps but this is a camera aimed at portraiture and landscapes so it can't be marked down for that but will be a consideration if you're a hard core sports/action photographer. For wedding photographers and folks looking for a very high quality travel camera this is the one.
The camera does have a true 3.5% spot metering mode amongst the other evaluative modes - very handy.
I'm not going to say too much about the lens as I posted a separate review so please check it out. What I will say is that the 24-105 is a perfect lens to complement the 5D - it offers superb image quality with a great range of focal lengths and is a great walk-around lens.
Battery life is good - I always have a spare with me but I've taken hundreds of shots on one battery and it's never actually run out yet. The manual quotes around 800 shots under optimum conditions.
I would consider a 2gb card the minimum for this camera. The display rather conservatively suggests a 2gb card can hold 114 shots when empty but it's easily into the high 170's. Raw files come in around 10 - 12.5mb. Tiff's from these are huge. Transfer of images across USB is incredibly slow however.
If you're looking to upgrade from something like a 400D it's a no-brainer. The 400D is a fine camera and I will be keeping mine no question but the 5D is just something else. If you have the cash and really want to expand your photographic horizons the 5D will not hold you back, in fact it will inspire you. An interesting note, most of the major online stock agencies will accept images from the 5D - the first non 1-series Canon to attain the honour....that says a lot about the image quality.