Hi I need some help! My Sigma 105mm just failed. It seems like the motor that controls aperture blades has problem. It will jump around whenever I tried to ...

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 ...

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 ...

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 ?

Sigma 18-50mm F2.8 EX DC MACRO Lens. Mon, 07 Feb 2011 09:18:54 -0800. Flaky Aperture Blade Control During AF on Sigma 105mm f/2.8 EX. Mon, 07 Feb 2011 09:05:20 ...

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 ...

I have three such cameras: the Canon IX, Canon Rebel G, and the Olympus C-2500L. One very easy way to disable the AF assist light is to turn off AF and use ...

The aperture ring is easy to turn and each setting is notchy, so that there is no question which aperture the lens has been set to. All of the aperture ...

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 ...