No, but fish eyes are a spcialised item, you either love them or you hate them, I am one of the later. Russian made equipment is so cheap you could easily buy one and if you don't like it or it goes south in a very short time then chuck it in the bin you won't loose much.
I ordered one for Christmas for my Contax MM mount. I'll have pics with it as soon as possible. Bear in mind that it will not meter with your manual camera(or any other for that matter). So you may want to make sure you have another camera or a meter with you.