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461 M/C

  • 000

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

Note the pricing has NOT been finalized by QHYCCD at this time. Final pricing is still subject to change.

The 461M/C was announced at NEAIC/NEAF 2019. It is not currently available for order, but expected first deliveries will be in Summer/Fall 2019. We will update this page as soon as QHY begins accepting orders.



The IMX461ALR-C has a diagonal of 55mm (Type 3.4) CMOS active pixel type image sensor with a square pixel array and 102 Million effective pixels. It has a 11760× 8896 pixel array with 3.76µm pixels. The sensor size is 44mm x 33mm and has ultra low dark noise. The QHY461 has both monochrome and one shot color versions.

The QHY461 and QHY411 is the world's first scientific CMOS camera with native 16-bit A/D on-chip. The output is real 16-bit with 65536 levels. The 16-bit ADC can get high sample resolution and system gain will be less than 1e/ADU. 

One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. Even with unbinned 3.76µm pixels the QHY461 has a full well capacity of 44ke-. When binned 2x2 to 7.5µm the full well is 176ke- and when binned 3x3 to 11µm the full well is 396ke-.

The QHY461 has only one electron of read noise at high gain and 2FPS high readout speed. One electron of read noise means the camera can achieve a SNR>3 at only 3 to 4 photons. This is perfect performance when conditions are photon limited, i.e., short exposures, narrow band imaging, etc., making this large area sensor ideal for sky surveys and time domain astronomy.

The QHY461 is a back-illuminated Scientific CMOS camera with extremely low dark current using SONY's Exmor BSI CMOS technology. In general, a fan-blade mechanical shutter will be broken if it is used 200,000 times or so, and in some specific cases it is easy to fail to switch on or off. The advantage of an electronic shutter over mechanical shutter is high reliability and stability when the observatory shoots a large number of pictures. The electronic shutter is a relatively perfect choice for the observatory.


Model QHY461U3G
Image Sensor SONY IMX461 BSI CMOS Sensor
Pixel Size 3.76um x 3.76um
Color / Mono Version Both Available.QHY461U3GM
Sensor Surface Glass Clear Glass
Effective Pixels
102 Megapixels
Effective Image Area
44mm x 33mm
Full Well Capacity (1x1, 2x2, 3x3)
44ke- / 176ke- / 396ke-
16-bit (0-65535 greyscale) for 1X1Binning

18bit in 2X2   19BIT in 3X3  20BIT in 4*4 software Binning
Sensor Size
TYPICAL 4.2inch
Full Frame Rate 
2.6FPS (For 10GigaE Version)
1.0FPS (For USB3.0 Version)
Read Noise 1.0e- (at high gain)
Dark Current TBD
Exposure Time Range 20us - 3600sec
Shutter Type Electric Rolling Shutter
Computer Interface USB3.0  (in QHY461M/C-USB3)       (under developming
10GigaE Fiber (in QHY461M/C-10G)  (under development)
Built-in Image Buffer 1GByte (8Gb)
Cooling System
Dual Stage TEC cooler(-35C below ambient)
Anti-Dew Heater
Telescope Interface
Optic Window Type

AR+AR High Quality Multi-Layer Anti-Reflection Coating

Back Focal Length
Reference Price

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