Hi Darran
I went from a 1 year old 50D to a 5 year old 1Dmk2, and it is no contest. I am aware that people always "back their kit" but in this instance it really is true. I started taking better pictures immediately, despite dropping just under half my pixels. To change cost me £100, though I sold the 50D to a mate so probably could have made more. First of all, don't get me wrong, the 50D is a fine camera, but the 1Dmk2 is better.
There are some uncomfortable trade-offs though, where the 50D actually kicks the 1Dmk2 into touch. It is not better in all respects, despite what one above poster says.
- Poor high ISO performance. I find that 400 is about my comfortable limit with the 1dmk2. 50D much better.
- Screen size and resolution infinitely poorer on 1Dmk2. I could edit my pics easily on the 50D. On the 1Dmk2 I have to wait until I get home. I really miss the screen on the 50D.
- Poor handling, very clunky. I don't mean to hold, it's very ergonomic, I mean the buttons and menu operation. Ideally you would have third hand, as almost everything requires 2 hands to do, and you have to stop doing anything else. Even reviewing photos is painful. Basically they copied the design from the last analogue 1 series, so if you ever used one of those, this will come very naturally. But vs the 50D it is terrible. I'd go as far as to say that it is ****-poor for a (then) top-of-the-range camera. Having said that, I can now do it with my eyes closed, but it is far from intuitive.
- Weight, approaching double I'd say. Very heavy. Battery also very heavy in addition, as is the spare you will want to carry....
So why did I do it?
- Improved autofocus. This is the #1 reason I changed really. Even though 5 years old, it is amazing vs any xxD camera. 45 focus points is brilliant.
- Build quality. This has already saved me once, when I slipped on ice and fell on it. Nothing. A 50D would have been in four separate pieces.... Having used a 1n way back when, I found I couldn't treat the xxD cameras like I used to treat the EOS 1Nhs. When I moved to digital I could not afford like for like, so went with a 30D. I trashed it. I didn't learn my lesson, and upgraded to a 50D when it came out. I managed not to trash it, but the ability to drag a camera through mud and sand, and not worry about rain or bashing it on things is very important to me. It might not be for you though.
- Picture quality - although this wasn't a reason for changing, as I didn't really know about it when I swapped, the 1Dmk2 8 megapixels are substantially better than the 50D's 15 megapixels. I don't know why this is, it just is.
Also be aware that your lenses effective focal length will decrease as the 1Dmk2 is a 1.3x crop not a 1.6x crop. I found I missed the reach, but I am learning to live with it..
Although reading about (and seeing images from) the 7D has me wondering, I doubt I will ever go back to something that is not a 1 series camera. The 1Dmk3 is likely better, though when I made the change I found I could buy three 1Dmk2 bodies for the price of a second-hand mk3, which was a no-brainer. I suppose what I would really like is the 1D mk4, as it addresses all the shortcomings of the mk2, and has all the advantages of the 7D to boot, but I can't get over the price hurdle. Money goes on glass first.
Rgds
Jonathan