Review on 📷 Sigma 1.4x EX DG Teleconverter for Nikon Mount Lenses - APO by Cody Hunt

This is a wonderful piece of technology. Just check where your lens fits in this list. Please understand that it is made specifically for Sigma lenses, not other companies' lenses. Don't expect this to work with your Nikon or Canon lens. If you have the right mount it will fit your Nikon or Canon, but the mount only applies to the bodies it works with, not the lenses it works with. In addition, the autofocus only works with the fastest Sigma lenses. Like I said, check the list so you know what to expect. Once you understand what it is, you'll know it's awesome. Just don't expect it to be anything different than some of the other commenters.