Stiff zoom ring?
Stiff zoom ring? I just bought a second hand Sigma 70-300mm lens. I bought it from a very well known photographer, trusting that a photographer looks after their equipment. The zoom gets stiff/stuck between 200-300mm. The seller said that they hadn't used this lens in years and it was just lying in the box for a long time. Is this why the zoom is stiff? Or shoul...