I'm looking for an extreme wide-angle/fisheye lens for my canon t2i, but am not sure what to get. I've heard the sigma 8mm is pretty good an obviously the canon 8-15mm f4 L as well, but that over a grand.. Also, i've already got the kit 18-55, 50mm 1.8 and 70-200 f4... so im looking for a lens that can get me that boinkers shot or an all out fisheye circular image... Any suggestions? I'm a litle concerned about the cost as well... Cheers! and thanks for replying! :)
The Tokina 10-17mm is one of the best values. It is a rectangular fisheye, so it covers a 180° field-of-view at 10mm. The neet thing is that you can zoom it down a 100° and get more flexibility in zooming. It goes for around $670.
If you are feeling adventurous, you can get a Samyang 8mm F/3.5 rectangular fisheye for around $330. This is a completely manual lens. You have to not only focus manually but also set the aperture manually. It takes practice to use since you will be opening the aperture to focus and frame and stopping it down to meter and shoot. Think manual (M) mode, taken to the extreme.