Sigma 28-105mm f/3.8-5.6 Aspherical IF - Unknown Mount

The Sigma 28-105mm f/3.8-5.6 Aspherical IF is a versatile standard-to-telephoto zoom lens designed for full-frame and film SLR cameras. It features internal focusing (IF), which means the lens length does not change during focusing, and the front element does not rotate, facilitating the use of circular polarising filters. The aspherical lens elements help to minimise distortion and aberrations throughout the zoom range, providing a practical all-in-one solution for general photography. When purchasing this model used, check for smooth movement of the zoom barrel, as some older Sigma zooms can develop stiff spots. SDS verifies the glass for clarity, looking specifically for any signs of coating degradation or internal haze. We test the autofocus and manual focus override for precision. It is also important to ensure the lens mount shows no signs of physical damage that could affect the alignment with the camera sensor.