不错的产品，导星灵敏度看来和Q５差不多，另外还有防溢出，内置机械快门可以自动拍暗场，价格还算可以。
Kodak describes the performance of this CCD: "Designed for demanding imaging applications, this sensor has additional features including electronic shuttering, peak QE (quantum efficiency) of 55%,
The array is 648 x 484 pixels at 7.4 microns square. Anti-blooming is standard.
However, in the ST-i camera we have also included a mechanical shutter enabling the camera to automatically take dark frames. This feature alone dramatically improves the performance of the ST-i, particularly when used as an autoguider. Cooling of the CCD to reduce dark current is unnecessary at the short exposure times common to planetary imaging and autoguiding, but there remains the possibility of bright pixels in an image that can raise the threshold of brightness required for the most sensitive guiding performance. The ability to automatically take and subtract a dark frame results in a very smooth background against which detection of dim stars is more reliable. Finally, while some inexpensive guiders save cost by using low cost 8 bit or 10 bit electronics, the ST-i camera uses a high quality 16-bit A/D for superior resolution of the full dynamic range of the CCD, greater than 70 dB. |
置顶卡
变色卡
千斤顶
显身卡
