Tamron Adaptall-2 28-200mm f/3.8-5.6 (71A) - Tamron Adaptall-2 Mount

The Tamron Adaptall-2 28-200mm f/3.8-5.6 (71A) was a significant development in the 'superzoom' category, providing a broad focal range in a portable package. It features a rotating zoom ring rather than a push-pull design and includes a focus lock switch to prevent barrel extension during transport. This lens is designed for users seeking a single-lens solution for general photography, compatible with various SLR systems through the Adaptall-2 mount. On the used market, the 71A should be checked for zoom smoothness; the internal cams can sometimes develop tight spots. SDS verifies that the zoom lock mechanism engages securely. Given the high number of moving parts in superzooms, we check for excessive play in the lens barrel when fully extended. We also test for optical decentring, ensuring sharpness is consistent across the frame at both ends of the zoom.