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you are right. My father has a lens sigma 10-20 f3.5-4 its not very bright and its for nikon.
I would need an adapter. Do you need which one ? (not the same as the redrock nikon to canon i presume. There doesnt seem to have an option to disamorce the automatic exposure on the lens. It needs the body of the camera in order to disamorce the automatic exposure i think. is it possible ?)
http://www.ebay.com/itm/Sigma-10-20...889?pt=LH_DefaultDomain_0&hash=item1e9bcf11e1 (this lens, but i would need an adaptor for canon)
My redrock adapter from nikon to canon wouldnt work since i cant control the autoexposure on the lens (its an automatic lens)???
I am not sure how it works. thanks in advance