QSI 628WSG Mono CCD Camera - Mechanical Shutter, 5-Position Filter Wheel & Integrated Guider Port

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QSI 628WSG Mono CCD Camera - Mechanical Shutter, 5-Position Filter Wheel & Integrated Guider Port
Item # QS-628WSG
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  • The QSI 628wsg CCD camera is built on the Sony ICX674 monochrome sensor and features high sensitivity with peak QE of 77%.
  • Guide with light from in front of the filter wheel! Integrated guide port (IGP) allows you to guide with a wide variety of guide cameras using any bright star of your choosing without the need for a separate guide scope! Guide camera (such as the Lodestar or STi, etc.) is sold separately).
  • Frame rates up to 100 microseconds with dual read rates of 800kHz and 8MHz.
  • USB 2.0 16-bit high speed output.
  • This QSI 628wsg camera package includes a 5 position, built-in color filter wheel.
  • Superior design, the full body enclosure allows perfect function without sacrificing a compact, sleek body.
  • Note: If you will be using 31mm unmounted filters with this camera, you will require part number QS-AC5-CFW31-S3 which is specialized mounting hardware to ensure that your filters are secure. This can be found in the Recommended Accessories to your right.


About the QSI 628 WSG CCD Camera

The QSI 628wsg CCD camera employs a 2.8 megapixel Sony CCD imaging sensor. The ICX674 offers remarkable sensitivity with a peak QE of over 77%. The high sensitivity, wide dynamic range, dual read rates, low noise, integrated guide port (allowing astronomers to guide using the light from the main telescope while picking off the light from the guide star in front of the filters) and internal 5 position color filter wheel allows unvignetted, filtered images even with very fast optical systems The superb imaging performance of 628 WSG camera is wrapped in an attractive, compact design with outstanding power efficiency and investment protecting upgradeability. The refined engineering and impressive fit, finish and attention to detail will surpass your highest expectations.The QSI 628wsg camera system is supported by industry-leading astronomy and microscopy image acquisition software, and a full camera control API is available for creating custom Windows or Linux applications.

QSI 628WSG CCD Camera Highlights

  • The QSI 628 camera comes with a Sony ICX674 sensor, with 2.8MP and a peak QE of 77%
  • All “WSG” models include an Integrated Guider Port (IGP)
  • An 5-Position Color Filter Wheel comes ready for your threaded 1.25” filters
  • High speed USB 2.0 with 16-bit output
  • Dual read rates of 800kHz and 8MHz with virtually undetectable read noise
  • Electronic shutter speeds to 100 microseconds
  • Internal, even-illumination mechanical shutter for dark & bias frames
  • Intelligent, programmable two stage TEC cooling to 45C below ambient
  • ASCOM-compatible Windows COM API
  • Linux drivers and API

About the Sony ICX694 Imaging Sensor

The QSI 628wsg camera employs a Sony ExView ICX674 interline transfer CCD image sensor with micro-lensing technology. The Sony ICX674 has exceptional sensitivity across the visual band, with peak quantum efficiency of 77%. The dark current (<0.002 electrons per second at -10°C) is amazingly low. The sensor has anti-blooming protection and a fast electronic shutter. Micro lenses cover the surface of the CCD to focus the light into each 4.54µm pixel, thereby increasing the optical response.

Sony ICX674 Specifications

  • CCD Architecture: Interline Transfer
  • Micro-lensing: Yes
  • Anti-Blooming: Yes - 800x suppression
  • Imager Size: 10.7 mm Wide x 9.2 mm High
  • Pixel Array: 1940 x 1460 active pixels
  • Total Number of Pixels: 2.8 megapixels
  • Pixel Size: 4.54µm x 4.54µm
  • Quantum Efficiency: Peak: 77% at 560nm
  • Dark Current: <0.002 electrons per second at -10°C
  • Intrinsic Read Noise: <7 electrons RMS (typically 5e- RMS)
  • Dynamic Range: 69db

About QSI Two-Stage TEC Cooling

The QSI 628wsg has a very efficient custom 2-stage thermoelectric cooler (TEC) subsystem. Intelligent, programmable cooling fans are integrated into the rear of the camera body to remove the heat generated by the cooler. Typically, forced air cooling lowers the regulated CCD temperature by up to 45°C below ambient utilizing 85% power. Tight +/- 0.1°C temperature regulation is maintained at temperature settings of 10°C below ambient and lower. A slim liquid heat exchanger (sold separately) can be attached to the rear of the camera body to increase the cooling further, up to 55°C below the temperature of the circulating fluid.

The cooled CCD image sensor is positioned in a hermetically sealed environmental chamber and covered with an anti-reflection precision optical window. The sealed chamber is purged with an ultra dry noble gas to increase heat conduction and eliminate the possibility of frost forming inside the chamber. To extend the useful period before re-purging is required, a user-rechargeable micro-sieve desiccant is employed to scavenge water molecules that enter the chamber. It is located behind a sub-micron, gas-permeable membrane to prevent particulate contamination of the CCD chamber.

QSI Integrated Guide Port WSG Upgrade

The QSI 600 Series WSG cameras provides a solution to the problems normally associated with guiding by integrating a Guider Port directly into the camera body. The pick-off prism is designed to sit in front of the filters so that you will always have all the star's light available for guiding.

The large 1/2” square pick-off prism of the integrated guide port is optimally positioned close to the internal filter wheel, supporting the use of guide cameras with large sensors, while preventing any vignetting of the main sensor, even with very fast optical systems. The Integrated Guide Port (IGP) is designed to support any camera with 12.5mm of back focus or less that can be attached using C-mount or T-mount threads.

The threaded adapter sits on top of the focus ring and allows the guide camera to be rotated to any position. The focus ring threads onto the focus base to allow 3mm of travel when focusing the guide camera. Once focus is achieved, the focus ring is locked with a set screw. The guide camera can still be rotated manually if desired without changing the focus. The end result is a rigid, easily focused guide camera that will not move or flex while your mount tracks the apparent motion of the night sky.

Additional Information

Additional Information

Manufacturer QSI
Color or B&W? Monochrome (B&W)
Sensor Type Interline Transfer
Series QSI 600
Pixel Size < 5 Microns
Chip Diagonal 10.1mm - 12mm
Warranty 1 Year Warranty
Sensor Manufacturer Sony
# of Sensors Single Sensor
Sensor Model ICX674
CCD Class Standard
Anti-Blooming Sensor? yes
Micro-lensing Sensor? yes
Quantum Efficiency Peak: 77% at 560nm
Pixel Size in Micrometers 4.54 microns square
Pixel Array 1940x1460 active
Sensor Diagonal 10.972mm
Minimum Exposure Time .0001 seconds
Maximum Exposure Time 4 hours
Integrated Guider? Yes, in camera
Binning Modes 1x1, 1 x CCD Height (User Set), 2x2, 3x3, 4x4, 4 x CCD Height (User Set), 5x5, 6x6, 7x7, 8x8, 8 x CCD Height (User Set), 9x9
Focus Distance To Sensor 2.10" (53.3mm) with 2.156" thread adapter (optional), 1.98" (50.2mm) with T mounting adapter, 1.75" (44.5mm) w/o mounting adapter
Shutter Type Digital & Mechanical
Dark Current <0.002 electrons per second at -10°C
Filter Wheel Yes
Interface USB 2.0
Operating System Compatibility Windows
Camera Cooling Type Thermo-electric Cooling (TEC)
Camera Body Dimensions 4.45” x5.0” x3.08”
Camera Weight 2 lbs. 14 oz.
Included Items

Included Items

  • QSI 628 Camera with Mechanical Shutter
  • 5 Position Filter Wheel
  • Integrated Guider Port
  • T-Mount Camera Adapter
  • T-Mount Adapter Cover
  • T-Mount to 2" Nosepiece
  • 12VDC/ 90-240VAC Power Supply
  • 10 ft. USB 2.0 Interface Cable
  • 10 ft. Standard Guider Cable
  • QSI Installation CDROM
  • Drivers for MaximDL/CDC and CCDSoft
  • ActiveX Developer's Kit
  • Custom Fit Pelican Storage Case
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