Tamron's compact Adaptall-2 telephoto — the 70-150mm f/3.5 constant aperture.
The Tamron 70-150mm f/3.5 in Adaptall-2 is a compact telephoto zoom with constant f/3.5 aperture. The constant aperture provides consistent exposure throughout the range — a practical advantage. The 70-150mm range is compact for telephoto. The Adaptall-2 provides cross-system compatibility. A practical telephoto with the constant aperture advantage.
The constant f/3.5 provides consistent exposure and brighter viewfinder than variable alternatives. Sharpness respectable. The compact 70-150mm range covers portrait to moderate telephoto. Build quality functional Tamron. The constant aperture is the key feature distinguishing this from variable-aperture alternatives.
Adaptall-2 universal mount. Filter thread varies. Weight compact for telephoto. Constant f/3.5 throughout. Ensure correct adapter included. The compact 70-150mm range keeps the lens smaller than 70-210mm alternatives. The constant aperture is the practical advantage.
Available at low prices. The constant f/3.5 is the selling point. Compact size. Ensure adapter included. The Adaptall-2 versatility adds value. Better than variable-aperture alternatives in the Adaptall-2 range. Good compact telephoto for vintage camera use.