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Model ST-7XME self-guiding CCD camera |
ST-7XME and ST-7XMEI
Enhanced QE CCD Cameras
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Model ST-7XME self-guiding CCD camera |
ST-7XME and ST-7XMEI
High QE Imaging Cameras
The Model ST-7XME is a self-guided imaging camera and contains two CCD detectors; one for guiding and the other for collecting the image. They are mounted in close proximity, both focused at the same plane, allowing the imaging CCD to integrate while the PC uses the guiding CCD to correct the telescope. In addition, a Remote Guiding Head port is now included for attachment of an external guiding head for those occasions when an external guider is desired. Using a separate CCD for guiding allows 100% of the primary CCD to be used to collect the image. The telescope correction rate and limiting guide star magnitude can be independently selected. The Full Frame Resolution is 765 x 510 pixels at 9 microns square. Carefully guided exposures up to one hour are possible, enabling a standard 8" SCT to capture images showing 19th magnitude stars from typical background observing sites. The imaging camera includes an electro-mechanical shutter, 16 bit analog to digital (A/D) converter, regulated temperature control, and has all of the electronics integrated into the CCD head. Communication to the PC is through the USB port. Click here for more information on recent improvements the new High Speed USB Interface. For a review of the ST-7E see the article in Sky & Telescope Magazine by Dennis DiCicco from August, 1999.
The Model ST-7XMEI is the same camera as the ST-7XME except that it has no internal guiding CCD and some extras and not included in order to keep the base price as low as possible. Both the ST-7XME and ST-7XMEI cameras use the same electronics and USB 1.1 interface that is as fast as some competitors' USB 2.0. Moreover, the USB 1.1 interface is easily extended up to several hundred feet with commonly available and relatively inexpensive USB extenders whereas USB 2.0 is not. As of March, 2006, both the single CCD and dual CCD models come with the Remote Guide Head port for attaching an external guiding head. For a comparison of the ST-7XME and ST-7XMEI please refer to the chart below.
Each imaging camera is furnished with the most complete compliment of software available from any manufacturer of astronomical imaging equipment. The software includes camera control, telescope control, image processing plus photometric and astrometric measurement functions. The software provided with SBIG equipment is unsurpassed in performance and ease of operation. Optional operating software can be expanded to include remote telescope control, a large stellar data base from the SAO catalog and Hubble Guide Star Catalog, plus a non-stellar data base from NCC, IC, PCC (Principle Galaxies Catalog), PK planetary nebulae, WDS (double star catalog), and GCVS (variable star catalog). Support for Windows, Mac and Linux are inlcuded.
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High QE KAF-0402ME CCD |
The Model ST-7XE is widely used in astronomy for both high quality images and scientific applications. The pixel binning modes allow the user to match the pixel size to various focal lengths ranging from long focal length refractors and SCT's to short focal length camera lenses. The dual CCD structure allowed SBIG to design an Adaptive Optics system to work in conjunction with the ST-7XE and other SBIG self-guiding cameras in the ST line. This unique system is described under the Accessory Products section of this catalog.
High Quantum Efficiency
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Kodak's latest version of the CCD we use in the ST-7XME model camera 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.
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M82. ST-7E image using AO-7 adaptive optics device and
8" f/12.4 |
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 and Options
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.
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| Custom Carrying and Storage Case |
Improved Carrying and Storage Case: The Deluxe model ST-7XME camera includes 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. This case is optional for the ST-7XME Standard and ST-7XMEI Models.
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The optional 25mm F/16 test lens assembly |
Optional Test Lens: To make testing of the camera easier we have designed an optional 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. See our Test Lens Product Announcement for more details.
Other Optional Accessories: The ST-7XME cameras support a variety of professional accessories. Each model contains a ROM programmed to support the CFW8A Color Filter Wheel for automatic RGB or LRGB imaging when attached to the camera. The CFW8A is a 5-posisiotn filter wheel designed to match the ST-7XME camera body in size, design and finish so that when it is attached, the camera and filter wheel become a single unit. In addition, the new CFW10, ten-position filter wheel is fully suooirted by the all new ST-7 cameras. The CFW10 uses the I2C port in the camera to receive power and control commands. The CFW10 is larger in diameter than the ST-7 camera body, but it is designed to introduce the least amount of back focus distance. When used as a replacement to the ST-7 camera's front plate, the CFW10 adds less than 0.6 inches of backfocus. This lets the user add camera lenses to the CFW10. Each model also has electronic relays built-in so that the cameras can be used as autoguiders for film astrophotography or for guiding other CCD cameras. The built-in TC-237H guiding CCD in the Standard and Deluxe models enables the use of both the AO-7 Adaptive Optics Device and the SGS Self-Guiding Spectrograph. The Self-Guiding Spectrograph was designed to give maximum resolution with the ST-7 camera. Several camera lens adapters are available from SBIG for attaching a variety of 35mm camera lenses directly to the ST-7 without the filter wheel for wide field imaging. Third party manufacturers support the ST-7XME and CFW8A color filter wheel combination with camera lens adapters as well.
Lower Price
The ST-7XME now comes configured in three models to fit any budget:
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ST-7E LRGB image of M27, the Dumbell Nebula |
(1) The ST-7XMEI is the single sensor version with no internal guiding CCD. The imaging CCD is a Class 2 KAF-0402ME with no column defects and the same high QE as the most expensive model. The entry level price for the ST-7XMEI makes it an ideal way to get started with the most popular, and now the most sensitive, astronomical CCD camera in its class. This model is also intended for those who may already have a guiding solution such as the STV or another CCD camera. It is also an excellent TDI imager. For more details see Alan Holme's recent PDF application note on the subject of TDI imaging with the ST-7XMEI or ST-9XEI cameras. The CCD may be upgraded to a Class 1 on special order. A TC-237H tracking CCD, water cooling and custom case may also be added at any time.
(2) The ST-7XME Standard Model is our new, lower priced, dual sensor, self-guiding version. It also uses a Class 2 ME CCD with high QE and no column defects. It includes all the essentials needed to get started: Larger built-in TC-237H tracking CCD, custom carrying case, water cooling heat exchanger, relay adapter plug and relay cables for self-guiding.
(3) The ST-7XME Deluxe Model is $200 less than our previous similar ST-7XME but it includes even more features and accessories: A Class 1 ME CCD, custom Pelican carrying and storage case, larger TC-237H built-in tracking CCD, and more. Now the best is available for less.
Click here for current price list.
Select A Model To Suit Your Application
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A single 1200 second H-alpha exposure of the California Nebula |
Each ST-7XME Deluxe camera system includes the following:
* Rugged camera body
with new high speed analog and digital electronics
* New High QE Class 1 KAF-0402ME imaging CCD with no column defects
* Built-in TC-237H CCD autoguider with 2.7X the area and 10X the sensitivity
of an ST-4
* High speed USB interface (full frame download in about one second).
* New I2C bi-directional expansion port
* New Remote Guide Head Port
* Standard accessory / telescope port
* User rechargeable desiccant plug
* Internal shutter
* 2" Nosepiece.
* Cooling Fan - on/off controlled by software
* New heat exchanger design with water cooling capability
* 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!)
* Telescope interface cable (for autoguiding)
* Universal Power supply
* SBIG's CCDOPS version 5 camera control software
* Software Bisque's CCDSoftV5 camera control and image processing software
* Software Bisque's TheSky version 5, level II
* Printed Operating Manual, Software and Software Manuals on CDROM
* Custom design Pelican carrying case with pre-cut foam for your camera and
accessories
* One Year Warranty Parts and Labor
* Demo CD-ROM with sample images and software
| Click here for curret prices | ST-7XMEI Special |
ST-7XME Standard |
ST-7XME Deluxe |
| High QE (>80% Peak) "ME" CCD | Class 2 | Class 2 | Class 1 |
| Column defects allowed | none | none | none |
| High Speed USB Interface | l | l | l |
| Internal shutter for automatic dark frames | l | l | l |
| Internal ROM for CFW8A control | l | l | l |
| Regulated thermoelectric cooling with fan | l | l | l |
| Universal Power Supply | l | l | l |
| USB Cable | l | l | l |
| Adjustable t-thread interface block | l | l | l |
| 2" nosepiece with t-thread base | l | l | l |
| CCDOPS ver.5 software on CD-ROM | l | l | l |
| CCDOPS ver.5 manual on CD-ROM | l | l | l |
| Camera Operating Manual on CD-ROM | l | l | l |
| TheSky v.5, level II software on CD-ROM | l | l | l |
| TC-237H Tracking CCD (657x495 at 7.4u) | $395 | l | l |
| Water Cooling Heat Exchanger | $99 | l | l |
| ST-7RC Adapter and Relay Cable | $9 | l | l |
| Printed CCDOPS ver.5 manual | $15 | l | l |
| Printed Camera Operating Manual | $15 | l | l |
| Custom Pelican Carrying Case | $149 | $149 | l |
| 1.25" nosepiece with t-thread base` | $49 | $49 | $49 |
Each ST-7XME Standard 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
* Built-in TC-237H CCD autoguider with 2.7X the area and 10X the sensitivity
of an ST-4
* High speed USB interface (full frame download in about one second)
* New Remote Guide Head Port
* New I2C bi-directional expansion port
* Standard accessory / telescope port
* User rechargeable desiccant plug
* Internal shutter
* 2" Nosepiece
* Cooling Fan - on/off controlled by software
* New heat exchanger design with water cooling capability
* 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!)
* Telescope interface cable (for autoguiding)
* Universal Power supply
* SBIG's CCDOPS version 5 camera control software
* Software Bisque's CCDSoftV5 camera control and image processing software
* Software Bisque's TheSky version 5, level II
* Software and Operating Manuals on CD-ROM
* One Year Warranty Parts and Labor
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
* 2" 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 CCDSoftV5 camera control and image processing software
* Software Bisque's TheSky version 5, level II
* Software and Operating Manuals on CD-ROM
* One Year Warranty Parts and Labor
Optional Accessories |
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| CFW9 Five Position Color Filter Wheel | CFW10 Ten Posisiton Color Filter Wheel | AO-8 Adaptive Optics |
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LRGB, Narrowband and Photometric filters |
Submersible water pump and tubing |
Self-Guided Spectrograph |
Model ST-7XME and ST-7XMEI
Typical Specifications
CCD |
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| CCD |
Kodak KAF-0402ME + TI TC-237 |
|---|---|
| Pixel Array | 765 x 510 pixels |
| CCD Size | 6.9 x 4.6 mm |
| Total Pixels | 390,000 |
| Pixel Size | 9 x 9 microns square |
| Full Well Capacity | ~100,000 e- |
| Dark Current | 1e-/pixel/sec at 0 degrees C. |
| Antiblooming | Optional (KAF_0402LE) |
Readout Specifications |
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| Shutter | Electromechanical |
|---|---|
| Exposure |
0.12 to 3600 seconds, 10ms resolution |
| Correlated Double Sampling | Yes |
| A/D Converter | 16 bits |
| A/D Gain | 2.3e-/ADU |
| Read Noise | 15e¯ RMS |
| Binning Modes | 1 x 1, 2 x 2, 3 x 3 |
| Pixel Digitization Rate |
Up to 420.000 pixels per second |
| Full Frame Download | ~1 second |
System Specifications |
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|---|---|
| Cooling - standard |
Single Stage Thermoelectric, Active Fan, Water Assist -45 C from Ambient Typical with water, -35 C w/air only |
| Temperature Regulation | ±0.1°C |
| Power |
5VDC at 1.5 amps, +/-12VDC at 0.5 amps, power supply included |
| Computer Interface | USB 1.1 |
| Computer Compatibility |
Windows 98/2000/Me/XP Mac OS-X / Vista 32 bit |
| Guiding |
Dual CCD Self-Guiding with built-in TC-237 CC |
Physical Dimensions |
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|---|---|
| Optical Head |
5 inches diameter x 3 inches 12.5 cm diameter x 7.5 deep |
| CPU |
All electronics integrated into Optical Head, No CPU |
| Mounting |
T-Thread, 2" nosepieces included |
| Weight | Approx. 2 pounds/0.9kg |
| Backfocus | 0.92 inches / 2.3 cm |
Price
Price and specifications subject to change without notice
Revised:
October 06, 2008 12:53:15 PM.
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