Tamron SP 35-210mm f/3.5-4.2 (26A) - Tamron Adaptall-2 Mount

The Tamron SP 35-210mm f/3.5-4.2 (26A) is a high-specification 'Super Performance' zoom lens from the manual focus era. It offers an expansive focal range covering wide-angle to telephoto, paired with a relatively bright variable aperture. The lens employs a two-touch design, separating the zoom and focus controls for more precise handling. Its optical construction includes internal focusing (IF) to maintain a constant length during focusing, making it a sophisticated travel lens for Adaptall-2 users. When purchasing a used 26A, check for zoom creep, particularly when the lens is pointed vertically. SDS inspects the complex internal mechanical linkages for wear, ensuring the aperture remains accurate across the zoom range. As with many SP series lenses, we look for signs of coating degradation or internal 'balsam separation' in the rear groups. The rubber grips should be checked for stretching or whitening (oxidation).