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Olympus ZD 25mm resolution, tested with Olympus E-420
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To measure and compare the Olympus 25mm's resolving power we photographed the Enhanced Digital Camera
Resolution Chart with it and a number of lens / camera combinations, each using their
best quality JPEG and default image tone and sharpening settings. Each lens was tested at every aperture and the sharpest result selected. We tested the Olympus 25mm with an Olympus E-420.
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. |
| Fitted on an Olympus E-420 the 25mm pancake delivers 2150 and 2200 lpph of horizontal and vertical resolution respectively; we expect this result to be identical to what you'd get with the E-520. Fit the premium 12-60mm zoom, and you'll eek out a fraction more resolution from the camera, but nothing that you'd notice in real-life. So here, the 25mm pancake appears to be mostly limited by the 10 Megapixel resolution of current Four Thirds bodies. Now let's see how the lens performs in our corner sharpness test under the same studio conditions. |
Olympus ZD 25mm with E-420 |
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Olympus ZD 12-60mm with E-420 |
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2150 lpph, ZD 25mm, f8, 100 ISO |
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2175 lpph, ZD 12-60mm at 25mm, f8, 100 ISO |
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Olympus ZD 14-42mm with E-410
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Leica 14-50mm with E-400
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2150 lpph, 14-42mm at 25mm, f8, 100 ISO |
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2100 lpph, 14-50mm at 25mm, f8, 100 ISO |
Olympus ZD 25mm with E-420
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Olympus ZD 12-60mm with E-420
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2200 lpph, ZD 25mm, f8, 100 ISO
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2200 lpph, ZD 12-60mm at 25mm, f8, 100 ISO |
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Olympus ZD 14-42mm with E-410
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Leica 14-50mm with E-400
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2150 lpph, 14-42mm at 25mm, f8, 100 ISO |
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2100 lpph, 14-50mm at 25mm, f8, 100 ISO |
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