Fisheye question for Nikon D40

[ml69]

I'm looking for a Fisheye Converter for my Nikon D40 the lens is 18-55mm. I've been looking around locally for a Fisheye converter. I was wondering what I need to get something like these pictures here. Not sure if I need a Fisheye converter, or a Fisheye Filter. I saw a fisheyey filter. I'm not really sure how it works. I don't wanna spend a lot for an actual Nikon Fisheye Lens.

 

[KmH]

I don't wanna spend a lot for an actual Nikon Fisheye Lens.

Then any cheap snap on lens attachment "fisheye" lens should work just fine for you.

You get what you pay for. Most of those attachments aren't really fisheye lenses, just plastic filters that have a lot of barrel distortion.

The sellers call them fisheyes as a marketing ploy.

 

[Village Idiot]

Unfortunately, a true fisheye will run you about $300 unless another cheap Russian version is discovered and you find it before people pimp it out on E-Bay for obscene amounts of cash.