Essa fisheye presta?Estou prestes a comprar.http://www.ebay.com/itm/New-8mm-F-3-5-Fisheye-Lens-for-Canon-T3i-T3-T2i-T1i-XSi-60D-50D-7D-/280865412063?pt=Camera_Lenses&hash=item4164e213df