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SBIG - STXL-11002M CCD Camera with std FW8-STXL Filter Wheel

Model#: 80-12260-00

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Manufactured by: Santa Barbara Instrument Group (SBIG)

Details

SBIG STXL-11002M CCD Camera with std FW8-STXL Filter Wheel

The new STXL cameras are the altest versions of the flagship STX series. The STXL is essentially the same camera design as the STX with three exceptions: First, the self-guiding CCD is moved from the main camera body to the new STXL filter wheel for guiding in front of filters; second, a rotating disk even-illumination shutter provides a shorter backfocus distance allowing the use of camera lenses; and third, the STXl uses the new STT remote guide head. 

A new STXL filter wheel option accompanies the release of the STXl series camera. The 8-position STXL filter wheel is of a similar design as the STT filter wheel. It uses the same precise positioning mechanism, but accommodates either 50mm round unmounted filters or 2" filters mounted in cells with 478mm threads. The self-guiding CCD is incorporated into the filter wheel, in front of the filters.

All of the other features of the STXl are the same as the STX series: Two-stage cooling to -60C, water cooling ready, ethernet and USB 2.0 computer interfaces. Several new innovations for serious imagers have been designed into this professional camera; to name a few:

  • USB 2.0 and Ethernet in each camera
  • Web browser control ready
  • Two-Stage TE Cooling
  • Minimum Cooling Delta -60C with Air Only
  • 12VDC operation (9-14VDC)
  • Self-guiding while downloading
  • Internal and External Self-Guiding
  • Optional Remote Guide HEad
  • Separate focus adjustment for built-in guider
  • New photometric shutter for large arrays
  • Variable spped fan
  • Quick Disconnect Water Cooling Ready
  • User Rechareable Desiccant Plug
  • Opto-isolated Relays for Telescope Control
  • Tracking Relay LED Indicators
  • Power Management

Optional Remote Guide Head

The STXL camera uses the same remote guide head as the STT series camera. This remote guider is essentially a special version of the ST-i camera using a KAI-0340 CCD that can be controlled directly from the STT or STXL camera without routing any power or USB cable back to the computer. Operating the remote guide head is the same as oeprating an internal self-guiding CCD using CCDOPS or other camera control software. A separate instance of camera control software does not need to be run.

SBIG STXL Camera CCD

Self-Guiding in Front of Filters

It is well known that the advantage of easier guiding through a separate guide scopes is often limited by differential deflection of the guide scope relative to the main optcial axis due to mechanical flexure or shifting of the mirror in the main OTA. It was this difficulty that SBIG addressed with our patented self-guiding design, and that we and other have addressed with an Off-Axis Guiding solution. Self-guiding is more convenient and more accurate, but can prove more difficult when narrowband filters are used. Previously, by piecing together an off-axis guiding system with aprts from different manufacturers, users could place a guider in front of the filters, but this was generally more expensive, required additional equipment and did not always integrate well. Also, controlling two cameras might require one computer to run two instances of camera control software. The ideal solution was therefore to design a self-guiding system that placed the guiding CCD in front of the filters using an integrated design that is easy to control. That is the new filter wheel/guider design of the STT and STXL cameras. The guiding CCD is built into the filter wheel and connects directly to the main cameras as an "external" tracking CCD. The opticald esign is optimizing fpr guiding and all the commands and control of the guider are identical to those ofn our traditional self-guiding design. The guider does not require any power or control cables routed back to a computer and the system can be operated by a single software package as one camera.

 

 

STXL SBIG CCD Camera AstrophotographyIn addition, the STXL filter wheel is designed with teh same precise positioning mechanism used in the STT design. With precise positioning, a filter is returned adn held in precisely the same position every time it is rotated into the optical path, even after a loss of power and no matter how many times the filter wheel has moved. For example, the image of the spot at far left is a large opaque piece on a filter in the STT filter wheel. The wheel was rotated four times before a flat field was taken through the dirty filter. The results of flat are shown in the next image. Our initial tests using the STT filter wheel measured this accuracy at better than 5 microns (less than one pixel).

 

2.0 and Ethernet Interface

The STXL series, like the STX and STT series cameras, has both USB 2.0 and Ethernet interface capability for the greatest versatility with a variety of computer systems. Users do not have to choose between the two. The Ethernet interface makes control of the camera over a network easy and less expensive than requiring a local computer to be controlled remotely. Moreover, the camera has a built-in web server. Also, with Ethernet, no camera drivers need installation.

 

Superior Cooling:

The STXl uses an innovative pin fin heat sink. This design is the most efficient for dissipating heat per given volume, and while it is more expensive than typical parallel fin heat sinks commonly round elsewhere, it provides superior performance and minimizes size and weight at the same time. This is one of the reasons the STXL camera weighs less than competing cameras with similar cooling performance. The new heat sink is an optimized design for this camera using a large custom pin fin heat sink mated directly to the hot side of teh 2 stage TE cooler to achieve maximum heat dissipation with a single large fan. In less than 5m minutes the STXL-11000 achieves a delta of -60C using air cooling alone.

 

Water Circulation Ready

While the design is aimed at sufficient cooling without water assistance, it is possible to use water instead of air in addition to air for optimum cooling. Using water instead of air will not require the use of a fan. Chilled water may also be used alone or with the fan for even greater cooling. 

 

Even-Illumination Shutter

Since the early days of the original ST-7 camera. SBIG has been providing even-illumination shutters in our cameras, something not found in the majority of other cameras for astrophotography. "Even-illumination" refers to the shutter mechanism designed to open and close in such a manner that is does not change the proportion of light falling on the sensor due to the shape or motion of the shutter itself. This is what one finds for instance with an iris type of shutter that opens-up starting at the center and closes over the center last.

 

User rechargeable desiccanty

In order to allow the user the greatest flexibility in the field, and to avoid having to return the camera to ther factory in order to purge the CCD chamber, we have designed the chamber to accept a rechjargeable desiccant plug similar to our current ST and STL cameras.

 

Full Frame Image Buffer

The STXL comes equipped with a full frame image buffer for storing image data during downloads. The STX will take an image during download process. We are exploring the possibility of using this buffer for pre-processing pixel defects based on a defect map provided by the CCD manufacturer, at the user's direction.

 

Variable Speed Fan

If the user desires air cooling only, the fan speed is controllable through software. Variable speed control allows the userto "tune" to fan to eliminate any resonance with the user's telescope thus supressing harmonic vibrations.

 

12C AUX Port

The STXL cameras has the same convenient I2C AUX port that we use on the STF and STT cameras for power and control of accessories such as filter wheels and Adaptive Optics.

 

STXL SBIG CCD Camera Astronomy Astrophotography                     


Tracking Relay LED indicators

This handy set of 4 LEDs will tell you at a glance if the camera is issuing corrections to the mount +X, -X, +Y or -Y directions during an imaging session.

 

12VDC Operation

The STXL will internally regulate a 12VDC supply so that the camera can be connected directly to any unregulared source such as a car battery. Four power LEDs indicate if the supply voltage drops to 11, 10 or 9 volts and when it is "good". Operation of the cmaera is possible with a supply voltage of 9.1 to 14 volts DC. Other LEDs indicate camera status and operation of the relays during guiding. 

 

Remote guide Head

The STXL cameras supports a new remote guide head. This guide head plugs directly into the main camera and operates as an "external" tracking CCD. No additional connections to a computer are required. 

 

 

 

 

Additional Information

Name SBIG - STXL-11002M CCD Camera with std FW8-STXL Filter Wheel
Manufacturer Santa Barbara Instrument Group (SBIG)
Model 80-12260-00
ADC (analog to digital converter) 16 bits
Antiblooming Yes
CCD Type Kodak KAI-11002M
Computer Interface Ethernet and USB 2.0 ports Windows Vista (32 or 64 bit), or Windows 7 USB 2.0 compatible or Mac OS X
Cooling Two stage Thermoelectric Variable Speed Fan (standard), -60C with air only Water cooling ready (Max Delta)
Dark Current e-/p/s at 0°C 0.5e-/pixel/sec at 0°C
Exposure 0.001 to 3600 seconds
Full Frame Download 6.3 seconds
Full Well Capacity 50,000 e-
Mounting connections 3" threaded accessory plate
Pixel Size 9x9 microns square
Power Requirements 12VDC at 6 amps, universal power supply included
Read Noise 11e-
Shutter Mechanical. Even-illumination