Moravian Instruments G4-16000 MARK II CCD Camera with KAF-16803 CCD with Enhanced Cooling
Moravian Instruments G4-16000 MARK II Monochrome CCD Camera with ENHANCED COOLING,
with LARGE 36x36mm imaging area, 16MPixel Resolution, Low Noise, High Quantum Efficiency Kodak KAF-16803 CCD Sensor for scientific applications,
such as astrometry and photometry as well as narrow-band astrophotography with Antiblooming and Electronic Shutter
The large, 9µm pixel size makes this camera ideal for large RCs, SCTs, Newtonians and similar telescopes with an aperture of around 10" - 14", but please contact us for further advice. For even larger telescopes, the G4-9000 version would be better suited.
Please note, there is no built in filter wheel in this camera due to the large sensor. We would recommend to buy a 5-position (or larger) external filter that would hold 50x50mm square filters that are necessary for this CCD size to achieve vignetting-free images. 50x50mm square filters from Astrodon, Astronomik, Baader, Chroma or Optolong are also available separately.
Sensor: Kodak KAF-16803 Monochrome CCD
Resolution: 4096 x 4096 pixels
Full well capacity: appr 100,000 e-
Pixel Size: 9 x 9 µm
Size of imaging area: 36.9 mm (H) x 36.9 mm (V)
Interface: USB 2.0 (USB 1.1 compatible)
Cooling: Two-stage Peltier up to max - 55°C - 58°C (now Liquid Cooling option is also available!)
Available on back order. Usual delivery time: appr. 2-3 weeks
MARK II version of this great and very popular camera is now available!
Choose your colour! Now with a touch-of-colour!
Main features of the MARK II range:
- faster download (up to about 2.5x the original)
- built-in tilting mechanism
- new, modern design with precise mechanical construction
- top quality electronics
Due to the wide range of variants, available usually on back order.
Usual delivery time is appr. 2-3 weeks.
Available G4 Mark II Camera Models
|Model||CCD chip||ABG||Color mask||Resolution||Pixel size||Image area||Preview download||Low-Noise download|
|G4-9000||KAF-09000||>100×||no||3056 × 3056||12 × 12 μm||36.7 × 36.7 mm||4.17 s||5.77 s|
|G4-16000||KAF-16803||>100×||no||4096 × 4096||9 × 9 μm||36.9 × 36.9 mm||7.19 s||10.03 s|
Shipping and Packaging
G4 CCD cameras are supplied in a foam-filled, hard carrying case containing:
- Camera body with a user chosen optional telescope adapter. A M68x1 adapter is included by default, a Canon EOS adapter is available separately for extra cost.
- A 100-240 V AC input, 12 V DC output “brick” adapter with 1.8 m long power cable.
- A USB Flash Drive with camera drivers, SIPS software package with electronic documentation and PDF version of User's Manual.
- 5 m long USB A-B cable for connecting camera to host PC.
- A printed copy of camera User's Manual
G4 CCD cameras are shipped in a foam-filled carrying case (left), larger case is used if camera is ordered with external filter wheel (right)
G4-16000 uses 16 MPx OnSemi KAF-16803 Full-Frame CCD chip.
KAF-16803 CCD specifications:
|Resolution||4096 (H) × 4096 (V) pixels|
|Pixel size||9 μm (H) × 9 μm (V)|
|Image area||36.9 mm (H) × 36.9 mm (V)|
|Full well capacity||~100,000 e-|
|Dark current||3 e-/s/pixel at 25 °C|
|Dark signal doubling temperature||6.3 °C|
G4-16000 electronics specification:
|Gain||1.6 e-/ADU (all binnings)|
|System read noise||11 e- RMS (Low noise)|
|12 e- RMS (Preview)|
|Full frame download||10.03 s (Low noise)|
|7.19 s (Preview)|
Binning can be combined independently on both axes.
Stated read noise is measured on particular CCD sensor, evaluated during camera design. Actual read noise of different sensors varies among various manufacturing batches, but also within single manufacturing batch. The camera read noise is determined by the sensor itself and the camera manufacturer cannot affect it.
Cooling and power supply
Regulated thermoelectric cooling is capable to cool the CCD chip from 42 to 47 °C below ambient temperature, depending on the camera type. The Peltier hot side is cooled by a fans. The CCD chip temperature is regulated with ±0.1 °C precision. High temperature drop and precision regulation ensure very low dark current for long exposures and allow proper image calibration.
G4 cameras are available in two variants, differing in the cooling performance:
Standard cooling cameras achieve regulated temperature difference up to 42 °C under environment temperature.
Enhanced cooling cameras can regulate temperature up to 47 °C under environment temperature. Compared to standard variant, enhanced cooling cameras are somewhat bulkier due to bigger heat sink, slightly heavier and somewhat noisier because of more powerful fans.
The camera head contains two temperature sensors — the first sensor measures directly the temperature of the CCD chip package. The second one measures the temperature inside the camera shell.
The cooling performance depends on the environmental conditions and also on the power supply. If the power supply voltage drops below 12 V, the maximum temperature drop is lower.
|CCD chip cooling||Thermoelectric (Peltier modules)|
|Standard cooling ΔT||45 °C below ambient maximum|
|42 °C below ambient typical|
|Enhanced cooling ΔT||50 °C below ambient maximum|
|47 °C below ambient typical|
|Regulation precision||0.1 °C|
|Hot side cooling||Air cooling (two fans)|
|Optional liquid coolant heat exchanger|
Chip cooling specifications
Maximum temperature difference between CCD and ambient air may be reached when the cooling runs at 100% power. However, temperature cannot be regulated in such case, camera has no room for keeping the CCD temperature when the ambient temperature rises. Typical temperature drop can be achieved with cooling running at approx. 85% power, which provides enough room for regulation.
Camera construction does not allow usage of both air and liquid cooling. Combined cooling (air with the liquid cooling option) is not available, because such cooling does not work effectively enough with air only nor with water only.
The 12 V DC power supply enables camera operation from arbitrary power source including batteries, wall adapters etc. Universal 100-240 V AC/50-60 Hz, 60 W “brick” adapter is supplied with the camera. Although the camera power consumption does not exceed 40 W, the 60 W power supply ensures noise-free operation.
Power supply specification:
|Camera power supply||12 V DC|
|Camera power consumption||15 W without cooling|
|52 W maximum cooling|
|Power plug||5.5/2.5 mm, center +|
|Adapter input voltage||100-240 V AC/50-60 Hz|
|Adapter output voltage||12 V DC/5 A|
|Adapter maximum power||60 W|
The power connector on the camera head uses center-plus pin. Although all modern power supplies use this configuration, always make sure the polarity is correct if other than the supplied power source is used.
Power consumption is measured on the input (AC side) of the supplied power adapter. Camera consumes less energy from 12 V power supply than state here.
The camera contains its own power supplies inside, so it can be powered by unregulated 12 V DC power source — the input voltage can be anywhere between 10 and 14 V. However, some parameters (like cooling efficiency) can degrade if the supply drops below 12 V.
G4 camera measures its input voltage and provides it to the control software. Input voltage is displayed in the Cooling tab of the Imaging Camera control tool in the SIPS program. This feature is important especially if you power the camera from batteries.
Compact and robust camera head measures only 154 × 154 × 65 mm (approx. 6 × 6 × 2.6 inches) for the model with standard cooling. Enhanced cooling increases camera depth by 11 mm.
The head is CNC-machined from high-quality aluminum and black anodized. The head itself contains USB-B (device) connector and 12 V DC power plug, no other parts (CPU box, USB interface, etc.), except a “brick” power supply, are necessary. Another connector allows control of optional external filter wheel. Integrated mechanical shutter allows streak-free image readout, as well as automatic dark frame exposures, which are necessary for unattended, robotic setups.
|Internal mechanical shutter||Yes, blade shutter|
|Shortest exposure time||0.2 s|
|Longest exposure time||Limited by chip saturation only|
|Internal filter wheel||no|
|Head dimensions||154 mm × 154 mm × 65 mm (standard cooling)|
|154 mm × 154 mm × 76 mm (enhanced cooling)|
|Back focal distance||33.5 mm (base of adjustable adapters)|
|Standard cooling head weight||1.6 kg (without filter wheel)|
|2.5 kg (with “M” external filter wheel)|
|2.8 kg (with “L” external filter wheel)|
|Enhanced cooling head weight||1.8 kg (without filter wheel)|
|2.7 kg (with “M” external filter wheel)|
|3.0 kg (with “L” external filter wheel)|
Back focus distance is measured from the sensor to the base on which adjustable adapters are mounted. Various adapters then provide back focal distance specific for the particular adapter type (e.g. Canon EOS bayonet adapter back focal distance is 44 mm).
Stated back focal distance already calculates with glass permanently placed in the optical path (e.g. optical window covering the CCD cold chamber).
Camera without filter wheel
G4 Mark II camera head front view dimensions:
Powerful SIPS (Scientific Image Processing System) software, supplied with the camera, allows complete camera control (exposures, cooling, filter selection etc.). Also automatic sequences of images with different filters, different binning etc. are supported. With full ASCOM standard support, SIPS can be also used to control other observatory equipment. Specifically the telescope mounts, but also other devices (focusers, dome or roof controllers, GPS receivers etc.).
SIPS also supports automatic guiding, including image dithering. Both “autoguider” port hardware interface (6-wire cable) and mount “Pulse-Guide API” guiding methods are supported.