Creating Fisheye Effect in Photoshop

Just gonna post a short and simple tutorial on how to get the fisheye effect in Photoshop. This has to be the cheapest way to get this effect on your photo (if you already owned Photoshop). Rather than buying that expensive fisheye lense or buy one of those compact cameras that has the function to automatically apply this effect on your photo. Since they're making lenses just for the purpose of