LensTip.com

Lens review

Tamron 35-150 mm f/2.8-4 Di VC OSD

2 January 2020
Arkadiusz Olech

7. Coma, astigmatism and bokeh

The lens should be praised for its coma correction. In the corner of the APS-C/DX sensor that aberration remains imperceptible as images of a diode, positioned in that place, don't differ from images of a diode in the frame centre. In the corner of full frame coma makes itself felt a bit at the shortest focal length, where you can notice very slight deformation of the point of light, but that effect is minimal and it cannot change our very positive assessment of the lens in this category.

Center, 35 mm, f/2.8 Corner APS-C, 35 mm, f/2.8 Corner FF, 35 mm, f/2.8
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh
Center, 90 mm, f/3.5 Corner APS-C, 90 mm, f/3.5 Corner FF, 90 mm, f/3.5
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh
Center, 150 mm, f/4.0 Corner APS-C, 150 mm, f/4.0 Corner FF, 150 mm, f/4.0
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh


When it comes to astigmatism we also don't have any reasons to complain. The average difference between horizontal and vertical MTF50 function values amounted to just 6.2% which is a moderate result. What's interesting, astigmatism shows a downward trend with the increase of the focal length because at 35 mm it reaches 10% and at the maximum focal length it drops to 3%.


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On the other hand we expected a noticeably better performance concerning out-of-focus areas. A distinct, double rim on the edge of the circle is really annoying. What's more, its centre isn't perfectly smooth, an effect most likely connected with a high number of aspherical elements in the construction of the lens. Additionally you can notice an influence of mechanical vignetting which decreases only on stopping down the aperture by 2 EV.

Center, 150 mm, f/4.0 Corner APS-C, 150 mm, f/4.0 Corner FF, 150 mm, f/4.0
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh
Center, 150 mm, f/5.6 Corner APS-C, 150 mm, f/5.6 Corner FF, 150 mm, f/5.6
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh
Center, 150 mm, f/8.0 Corner APS-C, 150 mm, f/8.0 Corner FF, 150 mm, f/8.0
Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh Tamron 35-150 mm f/2.8-4 Di VC OSD - Coma, astigmatism and bokeh