fisheyes distort and bend the image, sort of like a bubble, and wide angle simply fits more in the shot, with no distortion. for the sizes i'm pretty sure it says the right size on the lens, or if you're looking online sometimes theres a list of models that the lens is compatable with.
TO THE COMMONS!!!! but not up thos estairs......theyre forbidden fruit. and dont even think of landing a 737 in there on ms blums watch, she'll kick that shit out especially if it doesnt throw away its yogurtt