exquisitor said:
DaveN said:
I decided to do the math, just for fun. 85/1.8 USM
(425 g) + 100/2 USM
(460 g) + 135/2L
(750 g) =
1635 g. Sigma 105/1.4 - Weight:
1645g/58.0oz. Those three Canon tele primes combined weigh a bit LESS than the new Sigma alone!!
Yep, this is a monster lens. I would go just with 135/2.0 L, nothing else needed.
The new Sigma 105 weighs the same as Canon 70-200/2.8 L IS II or Canon 100-400/4.0-5.6 L IS II. Insane! I think "A" in the Sigma line actually means "Arduous" or "Ample".
You can't cheat physics. If you want telephoto lenses at wide apertures, they're going to be big. Yes, it weighs as much as a 70-200 f/2.8 zoom, but you're asking it to bring in 4x the light. On top of that, as a prime lens—and one of Sigma's, to boot—it has expectations of being optically
perfect, which again means more glass.
You also really can't compare it to the 1990s f/2 primes. Those are fine-enough lenses—I adore that 100mm f/2—but they were designed for film and their optics don't hold up to the standards of cameras like the 5DS R or D850. They're also made to a standard below the Sigma Art line (far below, in the case of the 85 and 100). Again, you can't expect a lens like this to be made to modern standards with modern quality and twice the aperture, but then be surprised when it towers over a simpler, cheap, film-era version.