Sharp six megapixel 1/1.8 type sensor
Published Dec 17, 2003
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dpreview staff
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Sharp today announced the six megapixel, 1/1.8" type RJ21T3AAPT/ST
CCD. This new sensor is exactly the same size (type) as used in many current
four and five megapixel digital cameras and so will be an attractive option
for digital camera manufacturer as an easy way to launch 'new' models
with more megapixels (it's sad but people are still buying the numbers
game). Once more this raises the question of noise and lens quality, how
much noisier (if it all) will this sensor be and will the current lenses
(some of which were designed for three megapixel 1/1.8 CCD's) be able
to deliver enough resolution to deliver any real gain (other than file
size). This new sensor has a pixel pitch of just 2.5 µm, the smallest
yet.
Phil: Next year I expect to see a swathe of 6 and
8 megapixel digital cameras, perhaps even one or two 7 megapixel. I can't
say I'm overjoyed to see manufacturers continuing to chase the megapixel
count, but unfortunately thanks to poor advice at the sales end of things
and the way that we as buyers compare using specifications this looks
to continue.. Come on people lets see better lenses, better AF, faster
cameras, better auto WB, and some REAL innovation.
Compact camera CCD pixel pitch & area compared
| Type |
Pixel
count |
Sensor
size |
Pixel
pitch |
Max. pixel area *
|
| 1/1.8" |
3.3 million |
7.2 x 5.3 mm |
3.5 µm |
12.3 µm² |
| 1/1.8" |
4.1 million |
7.2 x 5.3 mm |
3.1 µm |
9.6 µm² |
| 1/1.8" |
5.2 million |
7.2 x 5.3 mm |
2.8 µm |
7.8 µm² |
| 1/1.8" |
6.3 million |
7.2 x 5.3 mm |
2.5 µm |
6.3 µm² |
| 2/3" |
5.2 million |
8.8 x 6.6 mm |
3.4 µm |
11.6 µm² |
| 2/3" |
8.0 million |
8.8 x 6.6 mm |
2.7 µm |
7.3 µm² |
* Approximate, some manufacturers provide pixel
pitch to three decimal places, some only to one decimal place, thus we
have rounded all pixel pitch measurements up to one decimal place.
Click
here for help on sensor size 'types'
Sharp RJ21T3AA0PT/ST six megapixel CCD sensor
| Name |
• Dual Inline package: RJ21T3AA0PT
• Small Outline package: RJ21T3AA0ST |
| Type |
1/1.8" |
| Sensor size |
7.2 x 5.3 mm |
| Color filter |
Primary (RGB) |
| Aspect ratio |
4:3 |
| Total pixels |
• 6.3 million
• 2934 x 2167 |
| Effective pixels |
• 6.2 million
• 2872 x 2160 |
| Pixel pitch |
2.5 µm |
| Sensitivity |
105 mV (typ) |
| Saturation output |
550 mV (typ) |
| S/N ratio |
-88 dB (typ) |
| Range of operation |
-20 to +70 °C |
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Dec 15, 2006
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Dec 13, 2006
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Dec 6, 2006
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Dec 3, 2006
|
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