Best Lens Filter for Sigma 24-70mm f/2.8 DG DN Art
The Sigma 24-70mm f/2.8 DG DN Art is a masterpiece of modern optics, but its massive 82mm front element is a magnet for dust, fingerprints, and potential scratches. Finding the right filter is tricky; you need glass that matches Sigma’s legendary sharpness without introducing vignetting at the 24mm wide end. I’ve spent years testing glass…