Sigma 135mm f/1.8 DG HSM Art Aperture Series: Pescadero Creek Downstream (Nikon D810)
Get Sigma 135mm f/1.8 DG HSM Art at B&H Photo.
This series looks at sharpness across the field, along with foreground and background color correction in out of focus areas from f/1.8 through f/13.
In my review of the Sigma 135mm f/1.8 DG HSM Art in Advanced DSLR:
Sigma 135mm f/1.8 DG HSM Art Aperture Series: Pescadero Creek Downstream (Nikon D810)
Includes images up to full resolution from f/1.8 through f/13.