I use this product to boost the reach of my 70-200 2.8 VR II to more closely capture near-shore surfers and other subjects. It's compact, light and offers a decent boost in reach with imperceptible sharpness loss for my camera type.I can't think of anything negative to say about it- There are...
Consistent Output; Durable; Easily Interchangeable; Fast / accurate auto-focus; Lightweight; Rugged; Strong Construction