First I must apologize for my ranting. But let me blow of some steam, please. I wont be an ignorant fool and claim it's all the cameras fault, because it's most likely mine (fastest (class) camera in the world and an L w/USM lens? No way).
I CANNOT FOCUS PROPERLY WITH MY 1D! ARGH!
I shot a party last night, thank *GOD* I was not the main photographer... paid or unpaid. It's just a friend really wanted to see my camera, so I brought the 1D, 17-40, 420EX.
Busted it out, ISO1000, M, 1/8th second (I was a @#(*&@#(* moron for such a slow shutter speed), wide open @ f/4. Aimed, hit the rear * button to focus, hit the shutter release.
Camera freezes. Huh? I look down, Error99. I panic. OH MY GOD. Error99. I turn it off. Error99 doesn't go away. I take out the battery, put it back in. Still, Error99. Menu buttons don't work. Nothing works. WHAT?!
I have another battery, I put that one in instead... THANKFULLY... it goes away and I can start shooting.
I shot about 20 of great shots and I look down, 20 shots remaining. WHAT?! I forgot to format the card! ARGH. I format the card, losing those shots... because I don't have any more space and no time to go through my countless other pictures that I don't need.... I'd rather reshoot.
I shotshotshot the whole night, pics looked okay on the screen (which is never a decent measure of performance, especially with a 5 year old LCD panel in the 1D).
I load the photos onto my computer, Motion blur to the MAX. People weren't still, everyone was blurry because of my ridiculously low shutter speed. I shot may 80-100 pictures that night, I can only count maybe 20 or so that came out okay.
Secondly, I KEPT MISSING FOCUS. I don't know what's wrong with me. When I shot with the 17-40L and 420EX with my 300D, I nailed focus every time. And the club I shot in was FAR FAR FAR darker. In this club, I kept missing focus. I had shots where the background was sharp while the subjects were blurry. These really depress me because those *WOULD HAVE* been keepers.
I realized my first mistake after a while and bumped the shutter speed back up to around 1/20th which made it more acceptable. I got better shots after that. It's just the whole misfocussing thing was weird.
I heard something about the 1-series actually being SLOWER to focus than the other bodies in LOW LIGHT conditions, any truth to this? I found it delaying slightly before grabbing focus with my 17-40L. Maybe it's just the f/4 zoom, but I had better luck with my 300D in the pitch black nightclub. Interesting.
Something wrong with my camera? I hope not.... but then again, it's a pretty "battle worn" body with over 70k actuations. Still not even at it's mid-life crisis yet (but getting there... maybe this is it?)
I really hope it's user error vs camera problem.
OH. I just thought of something. I recall hearing that not all 45 focus pts are cross/precision/whatever sensors... when you're shooting with f/4. Especially in the dark. Isn't there a custom function to limit the 45 pts to something like 11?

will keep trying. The best things in life come dont come straight away and require TLC and a lot of attention

