Really, I knew you had to loose some image quality but i didnt know about the 'F'
Found these crazy conversions for my camera, end up poking what ever im taking a picture of in the eye
Raynox conversion lens and accessories for Panasonic LUMIX DMC-FZ28, DMC-FZ28EB, DMC-FZ18, DMC-FZ18EB Digital Cameras
Must be really heavy aswell :)