Graphical Comparisons

Relative Sizes 

Here is a comparison of relative sizes of various detectors. The comparison also includes pixel sizes and number of pixels.

 

SBIG tends to use Kodak chips, while the newqest cameras from Apogee and Finger Lakes use SITe chips. The SITe chips are thined and rear illuminated and thus have significantly higher quantum efficiencies than the Kodak chips.

Quantum Efficiencies

 Here is a comparison of quantum efficiencies for several types of CCD chips.

In this illustration the red curve which peaks at about 750 nm is typical for an ST7 camera (SBIG), the green curve which peaks near 640 nm is typical for an ST8 camera (SBIG), and the black curve which peaks near 680 nm is typical for the AP7 camera (Apogee).