art lens Tag

I was taken with the size and weight of the box in the storeroom that contained the Sigma 40mm F;1.4 DG HSM lens. Was that weight real, or had someone put a brick in the box as well as the lens? Oh, it was real all right - 1200g real. This was a puzzle - 40mm focal length for Nikon, Canon, or Sony E-mount cameras. But look at the size and think of the weight involved: That's a big barrel, and a lot of glass - okay, it's f:1.4, but really, there are smaller f:1.4 50mm and 55mm lenses out there. Why should SIgma take up all that room and material? What makes this necessary, or better. A dip into the Sigma website dedicated to it gave a hint. It is a lens that has come to the still world from the researches Sigma have made into cine lenses. Oh, don't panic - you still get recognisable F-stops and the barrel is AF and dedicated to still shooting - you won't be breaking your hand trying to get past gear cogs. But what you do...