Canon EF 70-300mm f/4-5.6 IS USM on Canon EOS 1Ds Mark III vs Canon EF 75-300mm f/4-5.6 IS USM on Canon EOS 500D, DIGITAL REBEL T1i or Kiss Digital X3 vs Tamron AF 70-300 F/4-5.6 LD Macro Canon on Canon EOS 450D, DIGITAL REBEL Xsi or Kiss X2

COMPARISON SELECTION (3 selected items max.)

DXOMARK Score

Best at f=70mm & f/4 [?]
15

Lens Metric Scores

Sharpness [?]
11 P-Mpix
Transmission [?]
5.5 TStop
Distortion [?]
0.5 %
Vignetting [?]
-1.3 EV
Chr. aberration [?]
10 µm

DXOMARK Score

Best at f=100mm & f/4.5 [?]
7

Lens Metric Scores

Sharpness [?]
4 P-Mpix
Transmission [?]
5.6 TStop
Distortion [?]
0.1 %
Vignetting [?]
-0.3 EV
Chr. aberration [?]
7 µm

DXOMARK Score

Best at f=70mm & f/5.6 [?]
7

Lens Metric Scores

Sharpness [?]
4 P-Mpix
Transmission [?]
5.3 TStop
Distortion [?]
0.2 %
Vignetting [?]
-0.5 EV
Chr. aberration [?]
9 µm