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 ...
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 · I cant stop the lens down - its works at 2.8 but no other appeture on Canon 7d Mkii or canon 60d - anyone know how to update the firmware and ...
The auto-focus speed is extremely slow, compared to Canon's USM. However, speed is decent if you set the focus limiter to either normal or macro range. I am ...
The manual focus ring is massive and takes up the whole front section of the lens. Manual focus adjustment feels extremely smooth. Sigma's HSM auto-focus is ...
Jan 1, 2010 · Hi, i am doing an autofocus algorithm for canon EOS camera by using the EOS SDK, but i dont know how to control the lens to move the focus ...
Disabling the auto-focus assist light. Why would anyone want to disable the AF assist light? You are probably wondering if my mind has gone off the edge.
Dec 2, 2009 · Hi, my camcorder HDR SR7 has the same problem. I think this is a code of autofocus error. The autofocus lens supposed to connect to the ...
Sigma 8mm F3.5 EX DG Circular Fisheye -- The High Resolution Lens. Sun, 21 Mar 2010 12:01:56 -0700. Sigma APO 70-200mm F2.8 II EX DG MACRO HSM Won't Auto-Focus.
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 ...