Sigma I Series 20mm f2 DG DN Contemporary - L-Mount Canon Cash Back BaK4 prism

BaK4 prism

Unfolds like an umbrella for quick installation and easy portability

And since it's a Nikkor

When silence is golden-shooting golf

UltraZip external zippers built to withstand decades of use

Sigma I Series 20mm f2 DG DN Contemporary - L-Mount Canon Cash Back BaK4 prismThe Sigma 20mm f2 DG DN Contemporary is a premium full frame compact prime for mirrorless cameras, combining a bright maximum aperture with an ultra wide perspective and stunning optical performance. The lens boasts an exceptionally small form factor, which makes it a highly practical option that's portable enough for everyday shooting and while easily delivering professional results. Its ideal for landscapes, wide angle portraits, weddings and