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Santa Barbara Instrument Group (SBIG) - ST-7XMEI CCD Imaging Camera
Purchase any new SBIG ST-7/8/9/10/2000/4000 Camera and SAVE $100 on the CFW9 and SAVE $200 on the Remote Guide Head when purchased at the same time as the camera
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$ 1895.00
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Click here for recommended accessories |
Purchase any new SBIG ST-7/8/9/10/2000/4000 Camera and SAVE $100 on the CFW9 and SAVE $200 on the Remote Guide Head when purchased at the same time as the camera |
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Improved Quantum Efficiency
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 these 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 Standard and Deluxe models have superior cooling
with a water assist ready heat exchanger built-in.
The KAF-0402E CCD, without microlens, is also available as an alternative to the microlens part
for applications where a microlens may not be desired. The QE for the KAF-0402E CCD is
essentially the same as for the previous KAF-0401E. The difference is the addition of greater
static protection. The ABG version of this part, the KAF-0401LE remains unchanged. While we
recommend that our customers select the ST-7XME for astronomy, we will continue to offer the
ST-7XE NABG and ST-7XE ABG so long as Kodak continues to manufacture these varieties of the CCD.
Owners of ST-7XE cameras (USB interface and E detector) may upgrade to the new ME CCD. Owners of
ST-7E cameras (parallel interface and E detector) may upgrade to the ME CCD only (keeping the
parallel interface) for or upgrade to both USB interface and ME CCD at the same time. However,
since we no longer make parallel electronics that support the E detectors, owners of the original
ST-7 model camera (non-E detector) must also upgrade to USB electronics in order to support the ME
CCD.
Improved Features
Larger Built-In Tracking CCD: The TC-211 tracking CCD has been replaced with a larger TC-237H in
the ST-7XME Standard and Deluxe models, as we have done in the ST-8/9/10/2000 cameras. The
TC-237H array is 657 x 495 pixels at 7.4 microns. This is the same CCD used in our former $1300
ST-237A imaging camera and current $2300 STV autoguider. The TC-237H is 2.7X larger than the
TC-211 CCD which means there is a more than double the chance you will find suitable guide stars
anywhere you happen to be looking without having to hunt.
In the tracking configuration, the TC-237H CCD will normally be binned 2x2 for increased
sensitivity. When binned 2x2 the field of view remains 2.7X that of the TC-211 however as the
pixel size is increased to 14.8 microns. The user may also use the TC-237H CCD in high resolution
(unbinned) mode if desired. ThsSky software from Software Bisque automatically generates finder
charts showing the correct placement of the guiding CCD field of view relative to the imaging
CCD’s field of view. Using this tool to plan your nights imaging is a great compliment to the
self-guiding cameras.
Built-in
Autoguider | Array | Pixel Size | CCD
Dimension | CCD Area | Field of View
at 80” FL | Number
of
Pixels |
| TC-237 CCD | 657 x 495 | 7.4 x 7.4 u | 4.9 x 3.7 mm | 18.3
mm2 | 8.2 x 6.2
arcminutes | 325,215 |
| TC-211 CCD | 192 x 164 | ~ 15 x 15 u | 2.6 x 2.6 mm | 6.8
mm2 | 4.5 x 4.5
arcminutes | 31,000 |
Of course, guiding with the TC-237H tracking CCD means that the imaging CCD spends 100% of its
time and quantum efficiency gathering the image. You are not required to compromise by giving up
half of the quantum efficiency or by making twice the exposure time as you might with other
self-guiding designs.
Upgradeability: Each of the the ST-7XME models is upgradeable. This is particularly
important to new buyers or anyone who wants to pay as they go. For example, the low cost ST-7XMEI
can be upgraded with a built-in tracking CCD or a Class 1 imaging CCD. It can even be upgraded to
an ST-8XE or ST-9XE at a later time. This allows the new user to get his feet wet without paying
for a deluxe system all at once.
Improved Carrying and Storage Case: The Standard and Deluxe model ST-7XME cameras
now include the same high quality carrying and storage case as the rest of our ST line of
cameras. This case is made for SBIG by Pelican. The custom cut foam securely holds the ST-7
camera and power supply with additional spots for accessories, cables, etc. The case is dust
proof, water proof, crush proof and carries a lifetime guarantee from the manufacturer.
Accessory Test Lens: To make testing of the camera easier we have designed a simple
test lens that screws into the t-thread front end of the camera. This is a handy accessory for
learning the various camera functions in the day time if you do not have a camera lens adapter.
It is included with the Deluxe model and can be added to the Standard and ”I” models.
Each ST-7XMEI Special camera system includes the following:
* Rugged camera body with new high speed analog and digital electronics
* New High QE Class 2 KAF-0402ME imaging CCD with no column defects
* High speed USB interface (full frame download in about one second)
* New I2C bi-directional expansion port
* Standard accessory / telescope port
* User rechargeable desiccant plug
* Internal shutter
* 1.25” Nosepiece
* Cooling Fan - on/off controlled by software
* Tripod mount 1/4-20 threaded side plate
* Adjustable t-thread ring
* 15 foot USB cable (third party USB extenders available for up to 500 meters!)
* Universal Power supply
* SBIG’s CCDOPS version 5 camera control software
* Software Bisque’s TheSky version 4, level II
* Operating Manuals on CD-ROM
* One Year Warranty Parts and Labor
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