Tamron 35-135mm f/3.5-4.5 (40A) - Tamron Adaptall-2 Mount

The Tamron Adaptall-2 35-135mm f/3.5-4.5 (Model 40A) is a versatile mid-range zoom lens. Covering everything from wide-angle to portrait-length telephoto, it was a popular 'all-in-one' choice for film photographers. It features a push-pull zoom mechanism and a dedicated macro setting at the 135mm end, offering a maximum magnification ratio of 1:4. Check the mechanical zoom action for consistency; some units may feel 'gritty' if dust has entered the internal helicoids. The front element is quite large, so check for scratches or damage to the filter thread. SDS checks the aperture for oil contamination and verifies that the complex internal zooming groups are properly aligned to ensure sharpness across the focal range. Ensure the Adaptall mount ring locks firmly.