[Anty_kui]

can anyone tell me what is it ?

[suet1225]

focal length < 15mm

[embu31]

Sorry it is not that simple. Canon has a 14mm f/2.8L which is not a fisheye lens whereas Canon's EF 15mm is a fisheye.

For detail please read the following link on what a fisheye lens is;

http://www.zeta.org.au/~andrewa/ajaa31.htm

[micromax]

無錯焦距小過15mm的鏡未必係魚眼鏡, 像nikon支及sigma支12-24mm就只是超廣角鏡. 魚眼鏡是一些變型無被校正的鏡頭, 有分180度對角線魚眼及圓型魚眼!