Sharpness

Sharpness at 90mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Tamron SP 90mm F/2.8 Di MACRO 1:1 VC USD lens was attached to a Canon 5D Mark III body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frame at 90mm

Center sharpness is outstanding between f/4 and f/11, with some softness evident wide open at f/2.8. At f/16 and f/22 sharpness is beginning to drop off a little.

Edge sharpness becomes acceptable at f/8, with best results at f/11-f/16, so you'll need to stop down to get sharp results across the frame.

Aperture	Centre Crop	Edge Crop
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22