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Pentax K10D resolution comparison
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To measure and compare the Pentax K10D'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 parameters.
To reflect typical usage, each camera was fitted with its most common kit lens option, respectively: the Pentax DA 18-55mm, Canon EF-S 18-55mm and Nikkor DX 18-135mm. We've also included a result for the K10D with the 40mm Limited Edition lens to see what the body's capable of. We tested each lens at every aperture and selected the sharpest results - in each case below this was achieved at f8. |
The crops below 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.
Using the DA 18-55mm kit lens at 35mm f8, the K10D delivered 2050 and 2150 lpph of horizontal and vertical resolution respectively. When fitted with the better quality Pentax DA 40mm Limited Edition lens, the K10D delivered a superior figure of 2200 lpph for both horizontal and vertical resolution. Note: we've taken these measurements at the point where moiré began to blur the lines, but the extinction resolution for the K10D in this test was much finer.
These results place the K10D higher than the Canon EOS 400D / XTi, but slightly below the Nikon D80 when each is equipped with the kit lenses listed. Fit the K10D with a superior lens and it can match the best results we've measured from both the Nikon D80 and Canon EOS 400D / XTi as seen in our earlier 10 Megapixel DSLR group test. Another respectable result then for the K10D, although again what we'd expect from a good mid-range 10 Megapixel DSLR. |
Pentax K10D
Using
Pentax DA 18-55mm f3.5-5.6 AL
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Pentax K10D
Using Pentax DA 40mm f2.8 Limited |
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2050 lpph, DA 18-55mm at 35mm, f8, 100 ISO |
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2200 lpph, DA 40mm at f8, 100 ISO |
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Canon EOS-400D / Rebel XTi
Using Canon
EF-S 18-55mm
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Nikon D80
Using
Nikkor DX 18-135mm |
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2000 lpph, EF-S 18-55mm at 35mm, f8, 100 ISO |
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2150 lpph, DX 18-135mm at 35mm, f8, 100 ISO |
Pentax K10D
Using
Pentax DA 18-55mm f3.5-5.6 AL
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Pentax K10D
Using Pentax DA 40mm f2.8 Limited |
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2150 lpph, DA 18-55mm at 35mm, f8, 100 ISO |
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2200 lpph, DA 40mm at f8, 100 ISO |
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Canon EOS-400D / Rebel XTi
Using Canon
EF-S 18-55mm
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Nikon D80
Using
Nikkor DX 18-135mm |
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2100 lpph, EF-S18-55mm at 35mm, f8, 100 ISO |
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2150 lpph, DX 18-135mm at 35mm, f8, 100 ISO |
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