为什么用pentax的这么少啊

上一張550的pp

这里的讨论很热烈，有兴趣的去看一看！
http://www_dpreview_com/forums/forum.asp?forum=1028

相机的电池性能非常好,达到1800毫安时,差不多是其他相机的两倍,而且体积非常小巧,严重关注,各位可否拿出该相机的测试图片?

如果450和佳能的s45价格差不多的话买哪个好？450贵200左右呢？

450大概4900
550--5800
来源
http://bizsurvey_china_com/mall/product?companyid=11&serialid=367
商家的地址就是pentax的北京维修站！
地址：北京市建国门内大街18号恒基中心 2 座 10 层维修站

性能指标太诱人了，可这评测？？？？？失望ing....
有DX能给说说吗？有DX用过吗？

PENTAX Optio 550（ZT dp上的评测）

Conclusion - Pros
Good image quality, average five megapixel resolution, lens has good resolving power
Good color reproduction
Low image noise at ISO 64, increases noticeably from ISO 100 upwards
Five times optical zoom lens gives good 'reach' in a compact body
Good range of manual controls and features
Live histogram in shooting mode, histogram in play
Interesting additional scene modes including panorama, digital filter and 3D modes
Image parameters (Sharpness, Contrast, Saturation), although limited adjustment
Spot metering
Good macro capability
Customizable short-cut controls (MENU + 4-way controller direction)
Long movie clips (up to 10 minutes each)
Shooting priority play mode (returns to shooting mode with a half-press of shutter release)
Good night exposures with automatic noise reduction, limited by 4 sec maximum
Average flash performance, no color cast
Good build quality, camera feels weighty and solid
Bright, high resolution LCD monitor with anti-reflective coating
Excellent battery life from supplied Lithium-Ion rechargeable battery
Value for money

Conclusion - Cons
Image noise from ISO 100 upwards
Pincushion lens distortion from half-zoom to telephoto
Some purple fringing / chromatic aberrations
Vignetting of image corners from wide to half-zoom
Image parameters don't have enough latitude of adjustment
Slow startup (approximately six seconds)
Needs a rear thumb grip
Limited continuous shooting capability (just over one frame per second)

Overall conclusion
Here's my rating of the Pentax Optio 550: (5 megapixel)

Detail Rating (out of 10)
Construction 8
Features 9
Image quality 8
Lens / CCD combination 7
Ease of use 8
Value for money 8

The Optio 550 offers very good value for money. It has a very impressive feature set, big zoom lens (by compact camera standards) and five megapixels of resolution. Image quality is good and images generally look good, especially at moderate print sizes or viewed at monitor sizes. Once the camera is switched on (which takes too long) it is fairly responsive and operating speeds are as fast as we would expect.

Considering the camera's feature, five times optical zoom and price the camera would have easily attained one of our 'Highly Recommended' ratings. Unfortunately I can not ignore the slow startup, ISO noise, pincushion distortion at half-zoom upwards and vignetting from half-zoom to wide. There's no doubting the Optio 550's ability to produce detailed, attractive images with good color balance it's just a pity that users may find themselves compensating for the problems.

Recommended

从网上听说：PENTAXoptio550当感光度大于ISO200后背景躁声就明显增加，实在令人遗憾。

3

1

看了看坛里的议论，感觉P的问题多多。
1、成像质量差。
2、广角端畸变严重。
3、对焦不实且慢。
4、耗电量大。
郁闷ing....
不知新品有无改善？

关心的是价格什么时候能跌进3000内。5X那款

现在300W以上的数码机瓶颈并不是CCD的象数多少，而在于现在的镜头解像度还没有追得上CCD的点面积的减小。所以再搞高倍变焦就要很用心去设计镜头了。

我有430
个人感觉，还是不错的，普通拍拍还是挺好的
毕竟身材小，镜片小。（十分方便，当时我买数码的第一要求，如果真要拍片，绝对带着传统机）
不要太多渴求，小而全，不太可能

如只是换了更高像数的CCD，那这台机没有什么意义！因为对现在的数码机，关键是镜头带来制约，而不是CCD。同一面积的CCD上象数越多，单只CCD单元的面积越小，感光能力也越小，最终NOISE就越大，可以上的感光度ISO就只能越低。