A solid-built ultra wide-angle lens.

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 ...

The lens is very solid and sturdy, yet not very heavy. Focus ring has full throw, rather than the very short throws on zoom lens, which may be why AF is slow.

They both offer zoom function in the 70mm to 200mm range, f/2.8 wide-open aperture for low-light work, and provide super-quiet auto-focus operation with ...

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 ...

Being a macro lens, I use it in manual focus mode most of the time anyway, especially for 1:1 (one-to-one) magnification. I managed to continue using it for ...

Personal review of the Sigma 28-105mm f/2.8-4 zoom lens ... sigma lens: Sigma 28-105mm f/2.8-4.0 Aspherical ... It is a 72 mm thread. I find the build-in flash ...

Personally, I've encountered auto focus problems with my Sigma AF105mm macro lens ever since I've had it. I find that sometimes AF is completely redundant in ...

Sigma 20mm f/1.8 D EX DG Aspherical Lens. Sun, 13 May 2012 12:58:28 -0700. Sigma EX motor. Sun, 13 May 2012 04:43:47 -0700. Sigma teleconverter compatibility.

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 ?