QUOTE(mengsuan @ Jun 30 2010, 11:51 AM)
Canon 1D interface is easier to use than Nikon camera, in my personal opinion.
It can get some widening effect with some serious vignetting. Feels more like minimizing effect rather than making it wide.
Canon CP-E4, CP-E5. Just buy and connect to 580EXII and you will get all the power.
i think i understand what u mean, thank you.

QUOTE(DecaPix @ Jun 30 2010, 01:49 PM)
Obviously you have been looking at wrong place!
New one is about 1.9k? or so.
if you dont mind buying used then maybe can get for 1.5k or less.
since you want to do funny shots then can get fisheye
Samyang manual focus is bout 1.3k?
all these will give you way better result than a converter
though you can argue that converter is only 10% of the price

i look on shashinki,
canon 10-22mm is around RM2700(RM3000 is the price on canon website.),
or i look at wrong lens,
actually have cheaper wide angle lens in the market?
i am sorry because before of this i only heard of tamron and sigma lens besides of canon,
this is my first time to know samyang's lens,
i will try to search the information online, thank you.