Summary: I use this lens in my full frame canon camera with the mount adaptor and I have good results. The focus is not really sharp, and it has some color aberrations, but this is almost what you are looking for when you invest your money in lomo lens. It's a good cheap fisheye lens to do different and cool videos and pictures.
Summary: Nice ultra wide fisheye lens! The viewfinder is helpful in composing your shot but is very close to the hotshoe thus knocking the flash a little off to the left, but not by much. Sturdy enough even though it is plastic. A fun lens to add to craziness to your photographs!
Summary: I bought it for my 16 year old son who loves photography. And he wanted to experiment with lomography, then asked me what Christmas gift, the camera and lens. loved this lens, and the pictures are fabulous.
Summary: My review is neutral mainly to warn Canon users. If you're thinking of using this lens with the canon lens adapter on an XSi. Don't bother. Since the XSi does not have a full size sensor it will crop in way too much. You won't notice the Fisheye. I'm sure this will work on a mark II or a full sensor camera well but not worth it on and XSi or a T2i etc.
Summary: I bought this along with an EOS adapter to use for a photography project. I used it on both 35mm (full frame) and 1.6x crop digital. I love the results! On the 35mm, the distortion is great and really emphasized my subject matter (artistic nudes). The 1.6x is like a wide angle with some fisheye distortion. Depending on the subject it really can work well. I'm quite happy with this lens and can't wait to toss it on the Diana F+ to see the true fisheye.
Summary: What do you want? It is plastic and that is the look I was hoping to get. I put it on a full frame DSLR with an adaptor so I do not get the full 120 film fish eye effect but the distortion and the dreamy plastic lens look is great.
Summary: I have read the reviews here and after ordering the lens, here is mine. This is a fisheye lens for the Diana f+ medium format camera. I have read about people having the canon adapter and wanting to use this lens for their canon cameras. Then post a bad review about the experience. This lens works perfectly on the Diana f+ camera. Using the 12 frame format will yield true fisheye pics. Using the 16 frame format will result in a slightly cropped fisheye view.