My uncle gave up his D700 for me because he got a better camera. The problem I had when I got it was that I didnt have a lens, my uncle wanted to keep his lens. My other uncle is also crazy about photography, he has 7 great lens at home. Each of them cost a fortune. I asked if I can borrow one of his lens, he gave up his Sigma lens to me. I have never heard of Sigma, but that lens works so great on my camera. From there, I wonder what other companies made lens for Nikon. Is it worth it to buy those lens?
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What other companies made Nikon Lens?