No need to be snippy. Dingie256 was trying to be helpful. While he didn't answer your lens question, he did raise some valid points. Have you ever watched a wedding photographer work before? It looks very stressful.
As far as a lens goes, you will want something fast for those indoor shots. The 50mm 1.8 is a great lens for the money, and will give you some more speed. It certainly doesn't count as a wide angle. See if you can rent a 17-55 IS 2.8 if you're dead set on shooting this yourself. You also need another body as RL. said incase something goes wrong.
I'm sorry i came across snippy wasn't my intentions at all. yes i have and no it doesn't seem stressful. it seems it will fit my brother's and my personality. I'm shooting this wedding because my family and my sister came to me and asked me to shoot the wedding.
Thank you for your opinion but i fear yours my not be any better
For low light fast lenses, I would suggest the 50mm f1.4 over the f1.8 since AF does hunt a bit in low light on the 1.8. For wide angle, 28mm f1.8 is good and maybe 85mm f1.8 for more reach.
Like whmetonjr said, 17-55f2.8 would be a good lens to have to zoom a bit.
You said you have a better flash, what are you using? I would also suggest the Canon 430EXII for a flash. It's cheap and has a lot of power. Great for all events.
I guess i really don't need the wide angle because my telephoto can handle it well.
for a flash i got one a little bit less then that one...
but I'll update to that one once i feel i can afford it. any suggestions on an off brand that might save me a little or a flash softbox?
That's a bit insulting than helpful.
But I will agree with your lens recommendation. The 50 1.8 is such a good/inexpensive lens to use.
@hallfrisch, because if your 18-200 and your flash, that should be all you need. But if you are really looking for a new lens I would suggest renting something like a 24-70mm 2.8 lens for the event.
Not too sure what lens would compliment your Super Zoom
why a 24-70 2.8 over the 17-55 1.8?
A $35 flash is better than your second shooter's? -_____-
I don't shoot weddings but I lurk their forums a lot and feel like I can recommend for your crop setup.
17-50/2.8 (Sigma and Tamron both make versions of this)
28/1.8 or 30/1.4
50/1.8
85/1.8
What is your budget? You don't want to break the bank, but you want to shoot the wedding to the best of your ability right?
I knew someone that shot strictly with a 60 macro and 24-105L on a 40D. She was both very proficient with light and skilled at getting moments.
BUT, had you posted this to the wedding section of this forum, you'd receive even more responses of "Get a Pro to do it." Honestly, from talking to newlyweds and engaged couples, these are some of the most cherished moments of their relationship. I'd hate to be the photographer that completely screwed it up.
I don't want to spend any more then i have to but I will spend what I need to preform to the best of ability for my sister who had asked me and my brother with our lack of knowledge and skill. Thanks for the list of lenses its helpful. I'd hate to screw it up but it is a risk my sister is willing to take.
Please, please let us know how it goes and what your sister and her new husband think of the images. I am really interested in the outcome. It would be great if you posted a few images here too.
Ill try to remember thankyou for you upbeatness was much needed amongst people telling me im being irresponible shooting my sisters wedding 
I think the money goes toward hiring a pro is better than buying a new lens from the stand point of your sister. However apparently it seems that she isn't willing to spend a penny to get high quality images.
So I guess after all the images don't really matter that much. I would suggest you getting a flash is enough. You have all focal length covered already. It's probably too expensive to get an actual upgrade. 50mm 1.8 is probably your only choice.
Actually I prefer 35mm F2.0 on crop. (~$200)
would you prefer a 35mm 2.0 over a 17-50 ? why?
I dont think its insulting. Its wedding they talking about. Once in a lifetime. Everyone hope for the best right?
We dont see photographer bring kit lens to wedding. Plus its going to be insufficient light unless the wedding
Is going to be under a open field in the bright sunny day
If not, i would not recommend 50mm f1.8 as its slow in focusing. Especially when the guest is going to move about.
If i would have to say, it would be rent a 24-70mm f2.8 as well as 70-200mm f2.8 IS II.
Anything wider than 24, just use kit with flash.
well im a photography taking a kit lens and I have seen it done. what do you think about a 17-50 with my kit and flash? and if i were to rent what should i expect for rates?
You will need a flash for "those dark shots at the reception." An f/2.8 lens is not fast, only faster than most lenses. You might get by with an f/1.4 or f/1.8 lens if the setting is not very dark - don't bet on it. The thin DOF at f/1.4 could result in some terrible shots if very close to the subject.
A 50mm lens is not a wide angle lens, even 30mm is not wide on a crop camera. Gut feeling is you would be better served with spending money on a good flash instead of a $35 flash and another lens.
Good luck.
ya i understand the whole wide angle lens scenario now. non the less would you also suggest a 17-55mm?
thanks every one for your help this is making it much easier for me and i'm learning a lot. 




