NGC 6946 & NGC 6939
Fireworks Galaxy and the Ghost Bush Cluster
- CAMERA QHY183M
- EXPOSURE 11h48min
FILTERS: Optlong L-Pro/Blue 1.25″ / Green 1.25″ /1.25″
DATES:June 18 to June 26, 2021
|QHY411 with PCIE Graber Card||$50,000|
|QHY461 with PCIE Graber Card||$25,500|
|Level Convertor Board Kit (for Scientific Cameras)||$60|
|PCIE Grabber Card||$1000|
|Liquid Cooling Kit||$300|
|DC 5V 5-meter/10-meter USB3.0 Active Extension Cable||$50 (5-meter) $60 (10-meter)|
*Shipment Expenses, Customs or Other Taxes are NOT Included in Reference Prices
QHY411 is using the 150 Megapixel SONY IMX411 sensor, with 54*40mm image area, native 16bit ADC, Back-illuminated, while QHY461 is with SONY medium format IMX461 sensor,44*33mm,100mega pixels, back-illuminated,16bit ADC. The features of their sensor are quite similar but the IMX411 sensor is bigger. The QHY411 is so far the largest resolution cooled CMOS camera in the world.
The QHY411/461 has both USB3.0 and 2*10GigaE interfaces. The 2*10GigaE version supports a higher readout speed.
QHY411/QHY461 have both mono and color version. The application of this camera includes astronomy imaging, astronomy photography, space object survey, satellite tracking, etc.
The new Sony sensor has native 16-bit A/D on-chip. The output is real 16-bits with 65536 levels. Compared to 12-bit and 14-bit A/D, a 16-bit A/D yields higher sample resolution and the system gain will be less than 1e-/ADU with no sample error noise and very low read noise.
One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels.In a typical front-illuminated sensor, photons from the target entering the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. The wiring structure reflects some of the photons and reduces the efficiency of the sensor.
In the back- illuminated sensor the light is allowed to enter the photosensitive surface from the reverse side. In this case the sensor’s embedded wiring structure is below the photosensitive layer. As a result, more incoming photons strike the photosensitive layer and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency the more efficient the sensor is at converting photons to electrons and hence the more sensitive the sensor is to capturing an image of something dim.
This is also a zero amplifer glow camera.
In the DSLR implementation there is a RAW image output, but typically it is not completely RAW. Some evidence of noise reduction and hot pixel removal is still visible on close inspection. This can have a negative effect on the image for astronomy such as the “star eater” effect. However, QHY Cameras offer TRUE RAW IMAGE OUTPUT and produces an image comprised of the original signal only, thereby maintaining the maximum flexibility for post-acquisition astronomical image processing programs and other scientific imaging applications.
Based on almost 20-year cooled camera design experience, The QHY cooled camera has implemented the fully dew control solutions. The optic window has built-in dew heater and the chamber is protected from internal humidity condensation. An electric heating board for the chamber window can prevent the formation of dew and the sensor itself is kept dry with our silicon gel tube socket design for control of humidity within the sensor chamber.
In addition to dual stage TE cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise.
|Image Sensor||SONY IMX411 BSI CMOS Sensor||SONY IMX461 BSI CMOS Sensor|
|Pixel Size||3.76um x 3.76um||3.76um x 3.76um|
|Color / Mono Version||Both Available||Both Available|
|Image Resolution||14304 x 10748 (Inlcudes the optic black area and over scan area)||11760 × 8896|
|Effective Pixels||151 Megapixels||102 Megapixels|
|Effective Image Area||54mm x 40mm||44mm x 33mm|
|Sensor Surface Glass||AR+AR multi-coating Clear Glass||AR+AR Multi-Coating Clear Glass|
|Full Well Capacity (1×1, 2×2, 3×3)||50ke- / 200ke- / 450ke- in Standard Mode|
80ke- / 320ke- / 720ke- in Extend Fullwell Mode
|50ke- / 200ke- / 450ke- in Standard Mode|
80ke- / 320ke- / 720ke- in Extend Full Well Mode
|A/D||16-bit (0-65535 greyscale)||16-bit (0-65535 greyscale) for 1X1Binning|
18bit in 2X2 19BIT in 3X3 20BIT in 4*4 software Binning
|Sensor Size||TYPICAL 4.2inch||TYPICAL 3.4inch|
|Read Noise||Apporx 1 to 3 e (in HGC Mode)||1e to 3.7e (in HGC mode)|
|Dark Current||Apporx 0.0011e/pixel/sec at -20C||Approx 0.003e/pixel/sec @ -20C|
|Exposure Time Range||20us – 3600sec||50us – 3600sec|
|Frame Rate||USB3.0 Port:|
Full Frame Resolution 2FPS @ 8BIT 1FPS @ 16BIT
5000Lines 4FPS @ 8BIT 2FPS @16BIT
3000Lines 7FPS @ 8BIT 3.3FPS @16BIT
2000Lines 10FPS@8BIT 5.5FPS @16BIT
1000Lines 20FPS@8BIT 10FPS @16BIT
500Lines 35FPS@8BIT 19FPS @ 16BITFiber Port : TBD
|2.7FPS @ 8BIT 1.3FPS@16BIT on USB3.0|
2.7FPS @ 16BIT 6FPS @ 14BIT on 10Gigabit Filber
|Shutter Type||Electric Rolling Shutter||Electric Rolling Shutter|
|Computer Interface||USB3.0 and 2*10Gigabit Fiber||USB3.0 and 2*10Gigabit Fiber|
|Trigger Port||Programmable TrigOut, High Speed Sync Port / GPS interface Port||Programmable TrigOut, High Speed Sync Port / GPS interface Port|
|Filter Wheel Interface||4PIN QHYCCD CFW Port||4PIN QHYCCD CFW Port|
|Built-in Image Buffer||2GByte||2GByte|
|FPGA Upgrade Via USB||Support||Support|
|Cooling System||Dual Stage TEC cooler（-35C below ambient with air cooling, -45C below ambient with ambient temperature water cooling). More deltaT below ambient can be achieve by using the cooled water cooling.|
Fan Cooling/Water Cooling Compatible
|Dual Stage TEC cooler（-35C below ambient with air cooling, -45C below ambient with ambient temperature water cooling). More deltaT below ambient can be achieve by using the cooled water cooling.|
Fan Cooling/Water Cooling Compatible
|Telescope Interface||Six Screw holes (See mechanical drawing)||Six Screw holes (See mechanical drawing)|
|Optic Window Type||AR+AR High Quality Multi-Layer Anti-Reflection Coating||AR+AR High Quality Multi-Layer Anti-Reflection Coating|
|Back Focal Length||16mm(without tilt adjust ring)|
28.5mm (with tilt adjust ring)
|16mm (without tilt adjust ring）28.5mm (with tilt adjust ring)|
QHY411 QE. Since SONY has not release the absolutely QE curve of IMX411. There is only the relativity QE Curve. QHYCCD did some test of absolutely QE for the 3.76um BSI sensor in another model. It can be used for just a reference. This article can be found in https://www.qhyccd.com/index.php?m=content&c=index&a=show&catid=23&id=261
|mode 0||mode 1||mode 2||mode 3||mode 4||mode5||mode6|