Sony Alpha DSLR-A100 review with DT 18-70mm f3.5~5.6
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Written by Gordon Laing
Sony Alpha DSLR-A100 resolution comparison using DT 18-70mm f3.5~5.6
Outdoor / Resolution / Noise / Noise 2 / Corner sharpness / Fringe & macro / Geometry / Vignetting
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To measure and compare the Sony DSLR-A100’s resolving power 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 lenses on each camera were set to f8 using Aperture Priority mode. The Sony Cybershot R1 was tested using our older chart, but the results are comparable. We also realise the Nikon D200 has an unfair advantage here, tested with a prime lens, but we’ve included the result as it shares essentially the same sensor as the Sony A100. |
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The crops are taken from the original images, saved as High Quality JPEGs in Photoshop CS2 and presented here at 100%. Each number represents 100 lines per picture height (lpph), so a figure of 20 means a resolution of 2000 lpph. With 2150 lpph of horizontal and vertical resolution, the DSLR-A100 improves on the Cybershot R1 and delivers a comfortably higher result than the Canon EOS-350D / Rebel XT. Indeed, despite being fitted with a budget kit lens, the Sony result is actually very close to that of the Nikon D200 fitted with a prime lens. It is however important to also compare real-life results, such as on the previous page. There the Sony A100 resolves roughly the same degree of detail as the Canon 350D. That said, in terms of our technical charts, the Sony DSLR-A100 certainly delivered an excellent result, and one which is a considerable improvement over 6 Megapixel digital SLRs. |
Sony Alpha DSLR-A100 |
Canon EOS-350D | |
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2150 lpph, DT 18-70mm at 35mm, f8, 100 ISO |
1750 lpph, 18-55mm EF-S at 35mm, f8, 100 ISO | |
Nikon D200 with Nikkor AF 50mm f1.8 |
Sony Cyber-shot DSC-R1 | |
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2200 lpph, 50mm, f8, 100 ISO |
1900 lpph, 14.3-71.5mm at 42mm, f8, 160 ISO |
Sony Alpha DSLR-A100 |
Canon EOS-350D | |
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2150 lpph, DT 18-70mm at 35mm, f8, 100 ISO |
1800 lpph, 18-55mm EF-S at 35mm, f8, 100 ISO | |
Nikon D200 with Nikkor AF 50mm f1.8 |
Sony Cyber-shot DSC-R1 | |
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2200 lpph, 50mm, f8, 100 ISO |
1950 lpph, 14.3-71.5mm at 42mm, f8, 160 ISO |
