Here are some comparison shots using a Digital rebel with 1.6x crop factor.

Lens test @ 28mm

(for us Americans, thats 1.1 inches)
Simga 12-24mm f/4.5 - 5.6 Tamron 28-75mm f/2.8 Canon 18-55mm efs

Full frame

Tamron 28-75mm

Tamron 28-75mm f/4

Canon 18-55 f/4

Sigma 12-24 f/5.6

Tamron 28-75mm f/5.6

Canon 18-55 f/5.6

Sigma 12-24 f/8

Tamron 28-75mm f/8

Canon 18-55 f/8

Sigma 12-24 f/11

Tamron 28-75mm f/11

Canon 18-55 f/11

Sigma 12-24 f/16

Tamron 28-75mm f/16

Canon 18-55 f/16

Sigma 12-24 f/22

Tamron 28-75mm f/22

Canon 18-55 f/22


Conclusion: I'd say at f/4 the Tamron beats out the other two lenses at any aperture. Im looking at the twigs just above 28mm in the Tamron pics. Of course the Sigma is at 24mm not 28 so it may be just a bit unfair.

The Full frame pic looks like there is some serious vingetting, but it is not centered in the frame, so I assume this is how the sky looked.

Lens test @ 50mm

Canon 50mm 1.8 Tamron 28-75mm f/2.8 Canon 18-55mm efs

Canon 50mm f/1.8 slightly overexposed

Full frame

Canon 50mm f/2.2

Canon 50mm f/2.8 (miss focused?)

Tamron 28-75mm f/2.8

Canon 50mm f/4

Tamron 28-75mm f/4

Canon 50mm f/5.6

Tamron 28-75mm f/5.6

Canon 18-55mm efs f/5.6

Canon 50mm f/8

Tamron 28-75mm f/8

Canon 18-55mm efs f/8

Canon 50mm f/11

Tamron 28-75mm f/11

Canon 18-55mm efs f/11

Canon 50mm f/16

Tamron 28-75mm f/16

Canon 18-55mm efs f/16

Canon 50mm f/22

Tamron 28-75mm f/22

Canon 18-55mm efs f/22


Conclusion: Tamron holds up well against the 50 prime and spanks the kit lens. Perhaps my kit lens has problems?

Lens test @ 70mm

Canon 70-200 f/4L Tamron 28-75mm f/2.8

Full frame

Tamron 28-75mm f/2.8

Canon 70-200 f/4 (back focused sorry)

Tamron 28-75mm f/4

Canon 70-200 f/5.6 (back focused sorry)

Tamron 28-75mm f/5.6

Canon 70-200 f/8 (back focused sorry)

Tamron 28-75mm f/8

Canon 70-200 f/11 (back focused sorry)

Tamron 28-75mm f/11

Canon 70-200 f/16 (back focused sorry)

Tamron 28-75mm f/16

Canon 70-200 f/22 (back focused sorry)

Tamron 28-75mm f/22


I shot this scene twice, and the 70-200 f/4L backfocused both times, I'll have to shoot it again someday. The Tamron looks good though, it will be interesting to see how close these two lenses really are. I know my L has absolutly zero purple fringing, I think that will be the true torture test for the Tamron.



The silver bullet Tamron 28-75mm f/2.8

Coors Light f/0.0

Tamron 28-75mm f/2.8