How does the 8-16 perform with DoF? Only thing I’d be concerned about with the 8-16 is the maximum aperture of f/4.5. especially if I’m going to be shooting Astro I don’t think that’s going to be enough. I really don’t think I should go more than f/2.8
At one point, I did consider the Sigma 8-16mm for landscape. But the inability to attach screw on ND filters and CPL made me look at other options.
For Astro, a prime with large aperture would be better.