QUOTE(dgrebel @ Feb 22 2008, 10:44 PM)
actual wide angle lens are best used with a full frame DSLR.. but considering EF-S 10-20mm cant be used with eos5D, many chose to get the 30d/40d. otherwise 17-40 f4l would suffice the needs. or just get a 20mm prime lens with fixed focus range.
10mm is the widest you can go on a Canon non-FF body.
for FF body, you can always go for those 12-24 and it's still WAY wider than 10mm on non-FF.
carcraze66, basically you need to know what you plan to shoot.
1. macro
2. wide
3. ultra-wide
4. tele
5. prime
a quick summary of what's available.
cheapest you can get are #2 wide and #4 tele. your kit lens would be 18-55 already (assuming you're going for the cheapest kit lens bundle la) since you're talking about EOS, which is clearly a Canon.
tele like the sigma / tamron / canon 70-300 can be acquired for like RM 600 - 700, the sigma and tamron one comes with macro (#1) mode! usually 1:2 ratio but heck, it's worth it mah.
then there's #5, the prime lens. the EF 50mm f1.8 is damn popular among Canon users. almost everyone has one because it's cheap (below RM 350. some people got it for around RM 250...... like me!) and snap sharp pics. just the other day i went to Orchid Park and met a fellow (stranger) photog - both of us carry also have the 50mm with us, it's like a common denominator among Canon users, either you had it or still have it.

so it's only Ultra-wide that you've not cover, which usually is costly (above RM 1k).
now with the kit lens (18-55) and cheapest tele lens (70-300) you also get macro capability already.
does that mean you won't be spending anymore on macro / wide / tele? NO!

it's later as you progress in skill, you'll find some stuff limiting you. or you wish to have lens that comes with features that allows you to take pics at less optimal conditions.
then you have options to get dedicated macro lenses (like the Tamron SP90, Sigma 105).
then you have options to get better kit lens (like Tamron 18-50 f2.8...... or even the Canon EF-S 17-55/2.8 IS USM that costs a bomb!)
then you have tele options (like the 70-200 F4L / F2.8L IS or non-IS version with USM)
then you have prime options (like EF 50mm f1.4......or even the f1.2!)
anyway I'm just stating the examples. there's plenty others to choose from.

you don't have to buy everything, just take a while and understand what kind of photographer are you and buy what you need.
phew. lengthy but that's as much as what my beginner brain can produce. open for corrections.
btw my favourite lens in my arsenal so far is my Sigma 18-200 OS. damn fun to go around every where with it. this lens put my kit + 70-300 in cold storage. hehe.
Added on February 23, 2008, 12:42 amQUOTE(davidmak @ Feb 22 2008, 10:53 PM)
One of the popular standard zoom lens is 24-105mm F4L IS USM using a FF body.
ouhh this i like man!
QUOTE(davidmak @ Feb 22 2008, 10:53 PM)
I see some photographers using only a 50mm F1.8/1.4/1.2L for their shooting which is superb. I respect their diligence.

I also see some pros using 70-200 range to cover extended range if the wedding dinner hall is very big and they want to capture some candid shots. But I would prefer 24-105mm range. Others may want to use
10-22mm range for ultra wide angle like taking the whole hall in just one shot.
Canon's 10-22 is not mountable on FF. too bad. they can get close to the 10-22mm by using the 17-40L