Lens Lab
    Tamron SP 17 mm f/ 3.5 Adaptall-2 model 151B
    Tamron SP 17 mm f/ 3.5 Adaptall-2 model 151B

    Tamron SP 17 mm f/ 3.5 Adaptall-2 model 151B

    17mm · f/3.5

    Overview

    The Tamron SP 17mm f/3.5 Adaptall-2 (model 151B) is a solid, all-metal ultra-wide prime with full-frame coverage, praised for its build quality and smooth 135° focus throw. Optically, it delivers a slightly cold, clean look with blue flares, but is soft and has strong light falloff wide open. A key drawback is the lack of a front filter thread; the 151B model omits the built-in color filters of the earlier 51B, requiring a hood for filters. It suits videographers and photographers needing a durable, adaptable wide-angle lens for full-frame or with focal reducers on APS-C.