Pentax's M42 wide-angle — SMC Takumar 28mm f/3.5 for classic film and adapted mirrorless use.
The Pentax SMC Takumar 28mm f/3.5 is a manual-focus wide-angle prime for the M42 screw-mount system. The 28mm provides useful wide perspective for landscape and street photography. SMC coating for improved optical performance.
Optically good — sharp from f/5.6 with SMC coating providing good contrast. The 28mm perspective is a classic wide-angle for 35mm film. Manual focus with smooth Takumar helicoid. The f/3.5 is moderate for 28mm.
M42 screw mount. 49mm filter thread. Compact and lightweight. SMC coating. Metal construction. Adapts to all mirrorless cameras via simple M42 adapters.
Available used very cheaply. M42 28mm lenses are plentiful from many manufacturers. The SMC Takumar quality is above average. For vintage lens enthusiasts and budget manual wide-angle adapted to mirrorless.