Sony Alpha DSLR-A100 review with DT 18-70mm f3.5~5.6 - Sony Alpha DSLR-A100 corner sharpness comparison using DT 18-70mm f3.5~5.6

Sony Alpha DSLR-A100 corner sharpness comparison using DT 18-70mm f3.5~5.6


Sony Alpha A100 results continued…

Outdoor / Resolution / Noise / Noise 2 / Corner sharpness / Fringe & macro / Geometry / Vignetting

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  To measure and compare the Sony DSLR-A100’s corner sharpness we photographed the Enhanced Digital Camera Resolution Chart with it and a number of rival models, each using their best quality JPEG and default image tone and sharpening settings. The Konica Minolta 5D and Sony Cybershot DSC-R1 were tested using our older chart, but the results are comparable.

We used the bundled lenses at their widest and longest focal lengths and with various apertures in Aperture Priority mode. The crops are taken from the extreme lower left corner of the chart and presented here at 100%.

The results below confirm the Sony DSLR-A100’s bundled DT 18-70mm lens is identical to the DT 18-70mm bundled with the Konica Minolta 5D. The charts may have changed, but the corner problems at wide angle with a fully open aperture still remain.

The wide angle results improve considerably as you move into the frame, but if you want sharp corners at the 18mm focal length, you’ll need to stop the aperture down. The Canon 18-55mm bundled lens performs much better here, although the clear leader is Sony’s own R1 with its built-in lens – this is even more impressive considering its maximum f2.8 aperture.

Zoom-in to the telephoto end though and the situation improves dramatically. The Sony DSLR-A100 with DT 18-70mm performs much better in the corners at 70mm, exhibiting only slight softness with the aperture wide open. This is however par for the course against its rivals.

Note: crop details taken from the same chart which appear smaller here are due to them being captured with lower resolution cameras and / or a lens which couldn’t focus as close to the chart. In each case though, the crop still represents the extreme left corner of each camera’s frame.

Sony DSLR-A100
Canon EOS-350D
Konica Minolta 5D
Sony Cyber-shot DSC-R1
Sony DSLR-A100 at 18mm f3.5
Canon EOS-350D at 18mm f3.5
Konica Minolta 5D at 18mm f3.5
Sony Cyber-shot DSC-R1 at 14.3mm f2.8
18-70mm DT at 18mm f3.5
18-55mm EF-S at 18mm f3.5
18-70mm DT at 18mm f3.5
14.3-71.5mm at 14.3mm f2.8
Sony DSLR-A100 at 18mm f8
Canon EOS-350D at 18mm f8
Konica Minolta 5D at 18mm f8
Sony Cyber-shot DSC-R1 at 14.3mm f8
18-70mm DT at 18mm f8
18-55mm EF-S at 18mm f8
18-70mm DT at 18mm f8
14.3-71.5mm at 14.3mm f8
Sony DSLR-A100 at 18mm f16
Canon EOS-350D at 18mm f16
Konica Minolta 5D at 18mm f16
Sony Cyber-shot DSC-R1 at 14.3mm f16
18-70mm DT at 18mm f16
18-55mm EF-S at 18mm f16
18-70mm DT at 18mm f16
14.3-71.5mm at 14.3mm f16
             
Sony DSLR-A100
Canon EOS-350D
Konica Minolta 5D
Sony Cyber-shot DSC-R1
Sony DSLR-A100 at 55mm f5.6
Canon EOS-350D at 55mm f5.6
Konica Minolta 5D at 55mm f5.6
Sony Cyber-shot DSC-R1 at 71.5mm f4.8
18-70mm DT at 55mm f5.6
18-55mm EF-S at 55mm f5.6
18-70mm DT at 55mm f5.6
14.3-71.5mm at 71.5mm f4.8
Sony DSLR-A100 at 55mm f8
Canon EOS-350D at 55mm f8
Konica Minolta 5D at 55mm f8
Sony Cyber-shot DSC-R1 at 71.5mm f8
18-70mm DT at 55mm f8
18-55mm EF-S at 55mm f8
18-70mm DT at 55mm f8
14.3-71.5mm at 71.5mm f8
Sony DSLR-A100 at 55mm f16
Canon EOS-350D at 55mm f16
Konica Minolta 5D at 55mm f16
Sony Cyber-shot DSC-R1 at 71.5mm f16
18-70mm DT at 55mm f16
18-55mm EF-S at 55mm f16
18-70mm DT at 55mm f16
14.3-71.5mm at 71.5mm f16
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