Reviews and Problems with Tamron SP AF 28-75mm f/2.8 XR Di LD Asp
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Value for money 8
Overall quality 5
Build quality 6
Tamron AF 28-75mm f/2.8 SP XR Di LD Aspherical (IF) - Review / Test Report
19 April 2012
Conclusion: The Tamron AF 28-75mm f/2.8 SP XR may shine with glory on APS-C DSLRs but it has found its master within the full format scope. The border resolution is generally soft at f/2.8 and you need stop down a bit in order to get a decent image quality across the frame. The lens produces very hefty vignetting figures at f/2.8 but the situation improves rapidly when stopping down a bit.