Tamron AF 28-75mm f/2.8 SP XR Di LD Aspherical (IF) - Review / Test Report - Samples Images & Verdict
Lens Reviews - Canon EOS (Full Format)

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Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 75.0mm
Aperture: f/8.0
Exposure 1/1250s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 54.0mm
Aperture: f/8.0
Exposure 1/250s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 800
Focal Length 38.0mm
Aperture: f/8.0
Exposure 1/60s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 400
Focal Length 75.0mm
Aperture: f/2.8
Exposure 1/200s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 57.0mm
Aperture: f/8.0
Exposure 1/500s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 28.0mm
Aperture: f/8.0
Exposure 1/640s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 75.0mm
Aperture: f/11.0
Exposure 1/800s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 48.0mm
Aperture: f/10.0
Exposure 1/640s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 28.0mm
Aperture: f/10.0
Exposure 1/640s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 75.0mm
Aperture: f/10.0
Exposure 1/400s

Verdict

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. The distortion characteristic is pretty good for a standard zoom lens - same goes for lateral CAs (color shadows). Bokeh fringing (LoCA) is basically a non-issue. The quality of the bokeh (out-of-focus blur) is acceptable but it's not a strength. The build quality of the lens is Ok but nothing to rave about either. Despite its flaws it is still an interesting lens when taking the very affordable price into account.

Optical Quality:    
Mechanical Quality:
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