Canon Powershot SD990 IS
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HQ Grade: B+
| A | is outstanding and exceptional, rated in the top 10% of digital cameras. |
| B | means they are good, with some standout features. |
| C | means they are mediocre, and probably more trouble than they are worth. |
| D & F | mean they are absolutely awful or old. Avoid at all costs. |
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This camera is ranked
- 31st of 175 in Ultra Compact
- 7th of 7 in ELPH
- 22nd of 27 in Powershot
- 2nd of 6 in 14 Megapixels
- 32nd of 82 in Canon
- 23rd of 105 in $200 - $300
| Compare 3 store ratings and prices... | ||
| Shop for Canon SD990 IS accessories. | ||
| Amazon.fr | 309,03 € |
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| Big VALUE Inc | $389.95 |
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| Adorama Camera | $399.00 |
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Answered!
May 11, 2009 11:10 PM
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John Snider
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May 12, 2009 7:45 AM
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It isn't more Pixels is bad perse... It is pixel count vs sensor size. Each pixel is related to a light sensing diode. When you place a lot of these diodes in a very small small space , although you have more diodes, each one gets exposed to less light energy. The end result is as you increase the sensors ISO settings (This sets electronically how sensitive each diode is to light) you end up with noise that looks like grain when you look at the photo at full size on your computer or when you print it out. At ISO 800 or above most small sensor cameras produce visible noise at any crop size.
Once you excede about 7-8 MP on a camera with a traditional CCD Sensor with a size of 1/16" or smaller you get more noise than image above ISO 800. The same problem exists, just not as bad, with a 1/2.3-1/2.5" sensor.
The solution is to match MP to desired print size and buy a camera with that number of MP or to spend more money for a larger sensor sized camera.
Once you excede about 7-8 MP on a camera with a traditional CCD Sensor with a size of 1/16" or smaller you get more noise than image above ISO 800. The same problem exists, just not as bad, with a 1/2.3-1/2.5" sensor.
The solution is to match MP to desired print size and buy a camera with that number of MP or to spend more money for a larger sensor sized camera.
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May 14, 2009 12:25 AM
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