Help please:) I'm thinking of purchasing this Sigma 4.5mm circular fish eye for canon. Can anybody please give me some idea about this lens, plus pictures as well. Thank you in advance. Sorry if i posted my inquiry in the wrong thread.

Update: Dear Mod please just erase this if you have the time. I already posted my inquiry at the right thread. Thanks a lot

Randy posted it before

http://digitalphotographer.com.ph/forum/showthread.php?t=9971&page=2&highlight=sigma+4.5mm