Fast Tamron SP 135mm f/2.5 with Adaptall-2 multi-system mount compatibility.
The Tamron SP 135mm f/2.5 Adaptall-2 is a fast telephoto prime from Tamron's acclaimed SP series, featuring the Adaptall-2 interchangeable mount system. The fast f/2.5 aperture at 135mm was exceptional for a third-party lens, providing excellent subject isolation and low-light capability at a classic portrait telephoto focal length.
Optical quality is very good with the SP designation confirming Tamron's premium optical tier. The lens delivers sharp, contrasty images with smooth bokeh at f/2.5 that flatters portrait subjects. The Adaptall-2 mount system allows the lens to be used on virtually any SLR system by swapping the rear mount adapter.
Build quality is excellent with the solid construction that defined Tamron's SP series. The Adaptall-2 mount system is the lens's unique feature — a single lens body works with Canon FD, Nikon F, Pentax K, Minolta, Olympus, and many other mounts through adapter rings, making it one of the most versatile vintage lenses available.
On the used market, the Tamron SP 135mm f/2.5 Adaptall-2 offers fast telephoto capability usable on almost any camera system. For portrait photographers wanting fast 135mm reach with multi-system compatibility, and vintage lens enthusiasts who appreciate the Adaptall-2 system's cleverness, it provides excellent quality at modest prices.