7Artisans' budget autofocus portrait prime for Sony FE with f/1.8 and STM motor.
The 7Artisans AF 85mm f/1.8 is a budget autofocus portrait prime available for multiple mirrorless mounts, launched around 2023. It brings AF capability to 7Artisans' portrait prime lineup at a price significantly below first-party and Sigma alternatives.
Optical quality is acceptable with decent centre sharpness improving by f/2.8. Bokeh at f/1.8 is smooth but not as refined as Sigma or Sony alternatives. The STM motor provides autofocus capability that 7Artisans' manual primes lack. Build is basic plastic and metal.
Available in Sony E, Nikon Z, and Canon RF mounts. Filter thread is 62mm. The Sony FE 85mm f/1.8, Viltrox AF 85mm f/1.8 II, and Sigma 85mm f/1.4 DG DN Art are progressively better alternatives at progressively higher prices.
Cheap used. Check AF accuracy at f/1.8 as calibration matters for portraits. Test sharpness and compare with better alternatives if possible. Justified only at a significant price discount versus the Viltrox or Sony.