Link: http://www.sigma-global.com/en/lenses/cas/product/art/a_20_14/
Price $899 at B&H
Definitely no filter threads.
Diffraction MTF
Geometrical MTF
Vignetting (it's not much different from the 24A and 35A)
Distortion Map
Price $899 at B&H
Definitely no filter threads.
Diffraction MTF
Geometrical MTF
Vignetting (it's not much different from the 24A and 35A)
Distortion Map
