Sharpness at 135mm

For this test, the Nikon Z 135mm f/1.8 S Plena lens was attached to a Nikon Zf body, which was in turn mounted to a sturdy tripod. Exposure delay mode was activated. Tonal and colour variance across the crops are due to change in natural light during the session.

The full frame at 135mm

The overall impression of sharpness is great throughout the aperture range. Even at the widest aperture of f/1.8, both centre and edge sharpness are outstanding. Sharpness drops off ever so slightly at f/11, before showing the softest results - which are still very good - at f/16.

Aperture	Centre Crop	Edge Crop
f/1.8
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16