Many photographers with a big budget buy the so-called trinity, that is f/2.8 constant aperture wide, standard and telephoto zoom lenses. Why? Because it is the common knowledge that is the way to go for any serious photographer. But my ‘go-to’ standard zoom lens is a f/4 constant aperture zoom lens, SIGMA 24-105mm f/4 DG OS HSM | Art, although I can afford more pricey standard zooms. I’ve taken tens of thousands of shots with this lens . Let me explain why I prefer this lens.