My attempt using Fishe Eye Hemi plug-in for Adobe Photoshop with Rokinon 7.5mm fisheye lens. Here is a few casual shots I took earlier tonight. It works pretty well overall but not for every shot. If you plan to de-fish your images, you really need to watch our for excessive distortions. Fisheye is a very fun lens and can also be used as UWA if you're careful enough. The pictures below are before and after defishing.