Sigma Lens For Canon Camera

Ruth asks…What lenses can I use for Canon and Nikon SLRs?For eg. Tamron lens? Sigma lens? thanks.

Also, it's better if you split both companies up.mr.eos answers:Just to make it clear, you can't use Canon lenses on Nikon and vice versa, and any 3rd party lens will be specific to a camera manufacturer too. Sure you know this already, just to be sure.

ChrisCharles asks…I am about to buy a canon rebel, but it comes with Sigma lenses. Is Sigma as good as Canon lenses?Also, I know a basic

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