SBIG ST-7XMEI "I" Series w/KAF-0402ME Class 2 CCD
Manufacturer : SBIG
Part Number : ST-7XMEI-C2
This CCD has the same array architecture as the KAF-0401E NABG with some improvements. Of greatest significance is the increased quantum efficiency due to the addition of a microlens array over the pixels and the use of MAR coated cover glass. The peak quantum efficiency for the KAF-0402ME used in all three models of ST-7XME cameras is almost 85%.
This item has been discontinued.
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SBIG ST-7 XME / XMEI: Perfectly Priced for Beginning Astrophotographers
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Model ST-7XME self-guiding CCD camera
with optional camera lens adapter
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In 2003 Kodak released a new version of the CCD we use in the ST-7XE cameras. The new detector is designated the KAF-0402ME. This CCD has the same array architecture as the KAF-0401E NABG with some improvements. Of greatest significance is the increased quantum efficiency due to the addition of a microlens array over the pixels and the use of MAR coated cover glass. The same kind of improvement has already met with great success in the ST-10XME camera. The peak quantum efficiency for the KAF-0402ME used in all three models of ST-7XME cameras is almost 85%. They are the most sensitive CCD camera in their class. The QE for the blue wavelength of 400 nm is 50% higher than that of the previous KAF-0401E CCD (increased from 30% to 45% absolute QE) and 15% higher in the red spectrum near H-alpha (increased from 72% to nearly 85% absolute peak QE).
The resulting high QE from UV to IR makes the ST-7XME perfect for imaging deep space objects such as dim galaxies and emission nebula. By fortunate circumstance, the peak QE occurs very near the H-alpha emission line at 656 nm, making this camera extraordinarily sensitive at this important wavelength. It could be said that this camera was "made for" capturing H-alpha! Previously, this level of QE was achievable only through the process of thinning the wafer and illuminating the image sensor from the backside. However, thinned, back-illuminated CCDs are very expensive, but with the KAF-0402ME, similar performance to a back-illuminated CCD is achieved with lower dark current and superior cosmetic specifications in a full frame front illuminated detector.
With our latest high speed electronics and USB interface, these ST-7XME cameras will download a full frame image in 1 second! Partial frames and focus mode will update faster than once per second. Imagine focusing in full frame mode. Kodak CCDs are well known for their low dark current and low noise characteristics. Additionally, the Stan
