<p>I am shooting with a Nikon D4, D3 and 750, I am looking for a light alternative to the 24-70 and I purchased a Nikon 35mm 1.8 FX lens, I like it but I wonder if I should have gotten the Sigma 35 1.4, its only a few hundred dollars more, and still a lighter option than the 24-70. I will use it for shooting mainly indoors in dim light. 2 important things to me are reliable focus and a light lens to carry and of corse quality photos. thanks</p>