LensTip.com

Lens review

Tamron 28-75 mm f/2.8 Di III VXD G2

18 January 2024
Maciej Lata││o

7. Coma, astigmatism and bokeh

At the very edge of the frame and at the maximum relative aperture the highest resolution result we got at the shortest focal length. It's no coincidence – as we've seen earlier, the lens corrects chromatic aberration the best at that focal length exactly. It is also a spot where the lens corrects coma perfectly well – you can even say at this focal lenth coma is practically non-existent.

The situation changes a bit at the longer end of the focal spectrum where the influence of coma becomes noticeable as a slight lengthening of point-like sources of light. Fortunately this effect is not high as the level of this aberration belongs to the borderline between low and medium values.

Center, 28ámm, f/2.8 Corner APS-C, 28ámm, f/2.8 Corner FF, 28ámm, f/2.8
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh
Center, 50ámm, f/2.8 Corner APS-C, 50ámm, f/2.8 Corner FF, 50ámm, f/2.8
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh
Center, 75ámm, f/2.8 Corner APS-C, 75ámm, f/2.8 Corner FF, 75ámm, f/2.8
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh


Please Support Us

If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values, amounted to 5.2% and it is a value positioned on the borderline between very low and low levels. Still, the differences between particular focal lengths are conspicuous. At 28 mm you deal with a value of 4.7%, at 50 mm it is barely 1.6% , but at the 75 mm focal length astigmatism increases to 9.2%.

Defocused circles of light are a very nice surprise. There are as many as two aspherical elements inside this lens but you don't notice any distinct onion-ring bokeh, quite the opposite is true, this phenomenon is here reduced to mere traces, definitely lower than in the case of the predecessor. The fact that mechanical vignetting disappears on stopping down the aperture by 1 EV, a noticeable improvement compared to the previous version which showed truncated circles of light even after stopping down by 2 EV, also should be praised. It is a significant progress.

Center, 75ámm, f/2.8 Corner APS-C, 75ámm, f/2.8 Corner FF, 75ámm, f/2.8
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh
Center, 75ámm, f/4.0 Corner APS-C, 75ámm, f/4.0 Corner FF, 75ámm, f/4.0
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh
Center, 75ámm, f/5.6 Corner APS-C, 75ámm, f/5.6 Corner FF, 75ámm, f/5.6
Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh Tamron 28-75 mm f/2.8 Di III VXD G2 - Coma, astigmatism and bokeh