To Making Sharp Images, I’ve added a new case study showing focus shift (or lack of it) with six 28mm lenses:
- Nikon AF-D 28mm f/1.4D.
- Nikon AF-S 28mm f/1.8G.
- Nikon AI-S 28mm f/2.
- Nikon 24-70mm f/2.8G.
- Zeiss 28mm f/2 Distagon.
- Leica PC-Super-Angulon 28mm f/2.8 (same as Schneider PC-Super Angulon 28mm f/2.8).
For the lenses with focus shift (most of them), I show two series each from maximum aperture through f/11: one series focused wide open, and the other series tweaked to compensate for the focus shift so as to produce the best results at f/4 - f/5.6.
Of general interest is also seeing performance across apertures varies with each of these lenses, color moiré and how tiny changes in focus alter the balance of sharpness in the foreground and background.