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 ?

After contacting Sigma, they mentioned that the chip inside the lens has to be upgraded. The upgrade was free of charge. When I sent the lens back to Sigma ...

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.

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 ...

Feb 6, 2011 · Tamron / Sigma 70-300 Macro mode hack. Please refer to my youtube ... How to Modify / Jailbreak your Tamron / Sigma 70-300mm Macro lens.

Personal review of the Sigma 70-200 f/2.8 EX APO HSM zoom lens.

A solid-built ultra wide-angle lens.

The system is very similar to the Sigma 105mm f/2.8 EX macro lens I reviewed previously. You push the manual focus ring forward to disengage the focus ring ...

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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 ...