Like the rest of Sigma's EX-line of profession lens, this one has a solid build, a cool and rugged finish, a non-rotating front, a metal lens mount, and is very ...
It turned out that the AF belt has weakened and they had replaced it. Now the AF works just fine on this lens. With 20/20 hindsight, it is apparent the AF belt ...
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 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 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.
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, ...
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The zoom ring is smooth, but too tight for my taste. And it has a non-rotating front, which is much easier to work with. It includes a flower-shaped lens hood.
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 ...
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 ?
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.