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Lens review

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

2 January 2020
Arkadiusz Olech

5. Chromatic and spherical aberration

Chromatic aberration

Photos below show that the Tamron 35-150 mm f/2.8-4 Di VC OSD doesn't have any problems with the longitudinal chromatic aberration. Even in blurry areas positioned far away in the frame you can hardly perceive any colouring of images.

Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration

Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration

In quite similar terms you can describe the correction of lateral chromatic aberration – graphs below show its performance on the edge of the APS-C/DX senson and on the edge of full frame.

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Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration

Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration

The aberration is completely imperceptible in the middle of the focal range where its level doesn't exceed 0.04%. We also don't have any reservations concerning the performance at the longer part of the focal range, where it keeps a level of 0.04-0.05% no matter what aperture you employ. The biggest chances to perceive lateral chromatic aberration you get at the shortest focal length. In its case, at the maximum relative aperture, the results reach medium values but they drop to low levels on slight stopping down.

Canon 5D III, RAW, 35 mm, f/2.8 Canon 5D III, RAW, 90 mm, f/11.0
Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration

Spherical aberration

When it comes to focus shift effect it seems in both photos, so at 100 and 150 mm, you can notice a slight shift toward greater distances. It makes us think spherical aberration isn't corrected in a perfect way. The appearance of defocused circles of light before and after the focus seems to confirm that impression. Once again in every case you can see noticeable differences in intensity of the rim of the circle and its brightness in the centre.

Canon 5D III, 90 mm, f/3.5, in front of Canon 5D III, 90 mm, f/3.5, behind
Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration
Canon 5D III, 150 mm, f/4.0, in front of Canon 5D III, 150 mm, f/4.0, behind
Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration Tamron 35-150 mm f/2.8-4 Di VC OSD - Chromatic and spherical aberration