LensTip.com

Lens review

Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF)

10 May 2016
Arkadiusz Olech

7. Coma, astigmatism and bokeh

The coma level is low or moderate but only when you limit yourself to the APS-C/DX sensor. In the corners of full frame the problem remains distinct across the focal range. It is obvious the coma contributes significantly to the worsening of the image quality on the very edge of the frame.

Center, 16 mm, f/2.8 Corner APS-C, 16 mm, f/2.8 Corner FF, 16 mm, f/2.8
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh
Center, 22 mm, f/2.8 Corner APS-C, 22 mm, f/2.8 Corner FF, 22 mm, f/2.8
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh
Center, 28 mm, f/2.8 Corner APS-C, 28 mm, f/2.8 Corner FF, 28 mm, f/2.8
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh


The astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 3.9% which we consider a low value. We didn’t notice any distinct differences of its correction between particular focal lengths.


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Out-of-focus areas provided by the Tokina 16-28 mm aren’t bad for a zoom lens. Still examining defocused circles of light you can find a trace of ‘onion rings’ bokeh; apart from that, on stopping down the aperture they get a lighter rim.

Center, 28 mm, f/2.8 Corner APS-C, 28 mm, f/2.8 Corner FF, 28 mm, f/2.8
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh
Center, 28 mm, f/4.0 Corner APS-C, 28 mm, f/4.0 Corner FF, 28 mm, f/4.0
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh
Center, 28 mm, f/5.6 Corner APS-C, 28 mm, f/5.6 Corner FF, 28 mm, f/5.6
Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh Tokina AT-X PRO FX SD 16-28 mm f/2.8 (IF) - Coma, astigmatism and bokeh