Generally I only use this lens for macro, and I find AF to be somewhat useless. AF is especially useless on semi-transparent objects. Since DOF is short, the ...

As indicated by their name, they are almost identical. They both offer zoom function in the 70mm to 200mm range, f/2.8 wide-open aperture for low-light work, ...

A solid-built ultra wide-angle lens.

Nov 19, 2019 · Sigma 105mm EX DG Macro - anyone know how to update the firmware and where can I get a copy of the firmware ?

The Sigma 20mm f/1.8 D EX DG Aspherical Lens has a clutch-like system for switch between AF and MF modes. The system is very similar to the Sigma 105mm f/2.8 EX ...

They were very nice to send the lens back upgraded and fixed with a diagnostic report. It turned out that the AF belt has weakened and they had replaced it ...

The Sigma 24-60mm F2.8 EX DG Lense is one of sigma's latest professional lens creations. Although simple in design, the overall lens offers a stunning array of ...

The lens has an auto-focus range limiter switch. I wish the switch is more like the auto-focus range limiter switch on my Sigma 105mm EX lens. The Sigma lens ...

As I mentioned in the 50mm lens review article, Canon's Micro-Motor is noisy and hunts quite a bit. It is hard to be discreet in a quiet social gathering when ...