Congrats!
Grab a 17-40L!

It's a really good general purpose landscape lens and will give you some nice wide perspectives with the full frame format.
A nifty 50 will be fairly limiting unless you're mostly just shooting people and portraits?
Cheers!
The price difference is enormous (if we are referring to an EF 50mm 1.8 ) so that may be somewhat of a concern. If you're looking to play that lotto over in Sigma land, there are some daring copies of the 50mm 1.4 that are like diamonds amongst anything less...but more likely (YMMV).
My copy of the 17-40mm 4L was a bad one (don't be an 'early adopter') so I sold it used although it hardly was ever. On a 5D even, I was without words with how disappointed I was with my copy. It was a terrible first impression of digital 35mm and it failed miserably. It made me in turn not have such a great impression of the 5D classic when I first had it (it was my first dSLR). Your mileage may (and most likely) vary from my own.
Today I see some fantastic results from this optic and all of the negativity that once clouded the internet for a bit is but a passing unknown these days. I wish the same could be said for the 50mm 1.2L but it seems that it shall be shrouded in mystery till the end of days.
I'm gonna stop this before this turns into a rant about the importance of quality optics to enjoy a camera of any prestige -- any at all.
P.S.
What the hell is an Error 04? I can't find it anywhere so please no "RTFM" post-happy responses; just any information in figuring out what this means as this plus the issue I'm having the exposure won't take with full suppression of the shutter button. I'm planning on sending it in to Canon because it needs a cleaning as well.
How much does the run-of-the-mill cost for 1Ds II users?
Thank you.






