So I've always been interested in the look and feel of a fisheye lens, particularly the ones that have close to 180 degree field of view. But the steep price for fisheyes is a big drawback, and I'm not sure how useful the lens will be. I've seen fisheye converters and other screw-on attatchments such as the canon .7x or other converters. Most of the converters are fractions of the price of a fisheye, so i'm left wondering. Should i just get the converters and see if I like the effect enough to get the lens? Are the converters good enough to the point that i wouldn't need a spearate lens? If i had the converter i'd be mounting it to my 20mm as that is currently my widest angle (I really really don't want to use the kit lens). Any suggestions or observations and even sample pictures would be appreciated. I would like to get an AF, but i suppose that manual focus samyang would be ok... Since most of the time everything is in focus anyway. Oh and I want to shoot portraits in a city scene, where the buildings get warped, as well as doing some super close-ups, and some videos with fast motion similar to those skateboard videos and such.