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The QHY290M COLDMOS – Cooled USB 3.0 Planetary and Deep Sky camera, uses an extremely sensitive BSI CMOS sensor, the Sony IMX290.  This sensor has very high QE, and very low (0.7e-) read noise.


QHY290M COLDMOS – Cooled USB 3.0 Planetary and Deep Sky camera
Back-illuminated (BSI) CMOS Sensor
The QHY290 uses an extremely sensitive BSI CMOS sensor, the Sony IMX290.  This sensor has very high QE, and very low (0.7e-) read noise.
128MB DDR Buffer
The QHY290 has a built-in 128MB DDRII image buffer. The benefit of the image buffer is that the memory will cache the image and transfer it to the computer when the USB interface is not busy or being interrupted, and the frame will not be lost or corrupted.  This buffer also allows a slower computer with USB 2.0 socket to capture every frame without loss even if the USB socket is occasionally busy with other peripherals.  This buffer also makes it possible to run multiple cameras using one computer without USB transfer problems.
Full Anti-Dew Solution
With more than a decade of experience designing cooled cameras, QHYCCD has applied this knowledge to the QHY290M COLDMOS camera.  The full anti-dew technology includes a sealed CMOS chamber with silicon gel tube socket and a heated chamber optical window.  This technology prevents dew from forming on the sensor itself, or on the chamber window, even in a high humidity environment.
QHY290M/C Camera Specification
CMOS Sensor
1/2.8-inch SONY BSI CMOS sensor
Effective Pixels
1920 x 1080
Pixel Size
2.9um x 2.9um
Effective Area
5.6 x 3.1mm
Electronic Shutter.
Typical 15ke-
Readout Noise
3.2e-@low gain    0.75e-@high gain
System Gain
Unity Gain
Frame Rate (on 8bit)
135FPS@1920×1080   220FPS@960×540     460FPS@480×270
ROI Support
Yes. Any Area ROI
Exposure Time
50us – 1800sec
AD Sample Depth
10-bit/12-bit (8-bit/12-bit output)
On Camera Image Buffer
Yes, 128MB DDRII Buffer
2-stage TEC, Typical -40C below ambient. Temperature Regulated
USB Powered for camera and +12V powered for TEC
Anti Dew Control
Air Connector for removable silicon gel tube
Heat board for optical window of sealed sensor chamber
Computer Interface
USB 3.0 Super Speed
Telescope Interface
M42/0.75&2-inch adapter. Optional C-mount adapter
Color Wheel Port
4pinQHYCFW2 socket
Guide Port
6-pin RJ11 Guide Port
Optic Window
AR+AR (Mono)    IR+AR(Color)
QHY290 Electric Interface
12V input with locking ring, USB 3.0 socket, 4-pin QHYCFW, 6-pin RJ11


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