why is my Sigma 70-300mm f4-5.6 Macro DG Lens not focusing

jonnydart 12 2 United Kingdom
26 Oct 2020 4:14PM
My sigma Sigma 70-300mm f4-5.6 Macro DG Lens has suddenly started to hunt and not focus below the 80mm setting. Any idea's as to what the problem might be. I have tried it on 2 camera's and it has made no difference.
29 Oct 2020 11:52AM
have you dropped it or knocked it?

my guess is that something has come loose inside, at 70mm its at its shortest if I remember right so maybe its squashing a part of the focus cabling inside the lens????

other obvious one, the internal lens element is also closest to the camera at that point, does it need a clean?

good luck

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