"The ultimate bokeh" – This lens is so good that it's worth abandoning Canon and Nikon

Sigma 135mm f/1.4 DG Art lens on a Sigma BF body in a photographer's hands.

A lot of photographers, myself among them, spend a lot of time and money chasing bokeh – and the new Sigma 135mm f/1.4 DG Art lens is, according to one of the internet's biggest bokeh fans, the new king of the hill.

In fact, the bokeh is so good that it makes this lens single-handedly worth choosing Sony or Panasonic cameras over Canon or Nikon bodies.