ClickClick wrote in post #4869760
Ok, I am shooting with a XTi / 430EX currently. (Glass is good as well).
I am going to upgrade, but I have just enough $$$ for either :
1 - 30D + 580EX
or
2 - 40D (nothing else).
I am mainly shooting bar/club/party scenes currently. I also do some photography off cruise ships for various events, etc.. (which the XTi has served me well here.)
Which would be the better deal?
It depends on what limits you're hitting.
The 580EX will get you one additional stop of light over what your 430EX gets you.
The 40D will get you more sensitive low-light focusing, at least for the points around the periphery (they are all cross-type just like the 30D's center point). If you're using the images straight from the camera, the 40D will give you significantly better images than the 30D at high ISOs, but only slightly better (if any) if you postprocess the raw images. I find the 40D's color rendering to be rather a bit better than the 30D's.
The 40D has a number of notable advantages over the 30D:
- Highlight tone priority
- 14 bits/channel color resolution (the 30D has 12)
- User-changeable focusing screens (this may be a bigger win than you think)
- Customizable menu
- Customizable shooting modes
- Greater sensitivity in the peripheral focus points (my testing with an f/2.0 lens shows no discernable difference in the low-light sensitivity of the center focus point, despite Canon's claim that the 40D's center focus point has diagonal as well as cross sensors).
- Nicer grip.

Anyway, I generally use the photos straight from the 40D -- they're that good. And that's true of all ISOs, including 3200. I'll not hesitate to shoot at 3200 with this camera if that's what it takes to get the shot.
For me, the 40D is worth it. If I were in your position and had to make the choice, I'd go for the 40D for sure. But like I said, it depends on what limits you're hitting. If you already have very fast glass and need more light on target, you'll have no choice but to pick up a more powerful flash.
But in that case, I'd pick up the 40D
and the flash.
