
Designed for use with select Sony digital cameras, this Sigma 340205 35mm f/1.4 DG standard lens features SLD and FLD (fluorite) glass elements to minimize axial and chromatic aberration. HSM (hyper-sonic motor) technology allows high-speed autofocusing.
Q: Can you use this lens with the A7iii?
A: undefined
Q: Will this lens fit the Sony Alpha a7R III?
A: Nope, according to spec this is A-mount lens. Sony a7 uses E-mount lenses. Alternatively you can use an adapter - something like MC-11 from Sigma. That can work.