I managed to continue using it for quite some time. But not being able to use auto-focus on an AF-capable lens bothered me. Finally, I decided to disassemble it ...

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 ...

how to service the Sigma 90mm f/2.8 Macro for Minolta AF. Sigma lens 90/2.8 AF 1:2 macro Minolta. How can I this lens demountable for repair.

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.

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 ?

One very easy way to disable the AF assist light is to turn off AF and use manual focus instead. ... AF function is to tape over the AF assist lamp using ...

A solid-built ultra wide-angle lens.

The auto-focus mechanism on this lens is based on Canon's micro motor. It is noisy and doesn't sound very smooth. In low-light and low-contract situation, it ...

Although simple in design, the overall lens offers a stunning array of features which could leave even the most seasoned camera-buff in a state of euphoria.

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, ...