Tamron 28-70mm f/3.5-4.5 (59A) - Tamron Adaptall-2 Mount

The Tamron 28-70mm f/3.5-4.5 (model 59A) is a compact standard zoom lens for the Adaptall-2 system. It covers the most frequently used focal lengths, from wide-angle to short telephoto, making it a highly practical 'walk-around' lens. The 59A is appreciated for its surprisingly close focusing capability for a lens of its class, offering a maximum magnification ratio of 1:3 at the 70mm end. When purchasing this model used, it is important to check the zoom mechanism for consistent tension throughout the range. SDS checks for common issues such as internal haze or 'balsam separation' between elements. The Adaptall mount must be checked for mechanical integrity, ensuring the aperture pins communicate correctly with the camera adapter. The condition of the multi-coating is also inspected for cleaning marks.