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QHY 128C Colour CMOS Cooled Camera 36x24mm (IMX128) 5.97µm

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The QHY128C is one of the top performing cameras in the QHY COLDMOS line. The Sony Exmor IMX128 sensor is used in the Nikon D600 DSLR an in such, has proved itself to offer exceptional image quality. In the QHY128C, this sensor is implemented specifically for astronomical use with custom thermal noise reduction technology. With low (1e- to 4e-) read noise, 5.97µm pixels, 74ke- full well capacity and 14-bit A/D, the camera has a dynamic range of more than 14 stops.

Many cameras claim to output RAW image files, but there is often still some internal processing performed on the image. This can have a negative effect on astronomy images such as the "star eater" effect. The QHY128C outputs TRUE RAW data, preserving the original data for maximum compatibility with astronomical imaging processing programs and other scientific imaging applications.

In addition to dual stage TEC cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise in the QHY128C. As a result the dark current of this camera is a remarkable 0.0006e-/p/s at -15C, the lowest dark current of any camera in the COLDMOS line.

The optical window features high quality AR+AR multi-layer coatings. In addition the sensor surface is AR (Anti-Reflection) coated, all of which significantly reduces halos around bright stars. IR blocking is not present, so that the cameras can be used with maximum sensitivity for H-alpha and near IR capture when desired, or a simple IR blocking filter (L filter) can be attached for typical RGB imaging with IR cut.

Many CMOS cameras exhibit some form of amplifier glow. With QHYCCD anti-amp glow technology, the QHY128C exhibits zero amplifier glow, even in long exposures. This makes long exposures of DSOs possible and easier to process. There are only a few CMOS cameras that can achieve zero amplifier glow results. The QHY128C is one.

With deep cooling condensation or fogging can become a problem. QHYCCD has implemented full dew control solutions for the 128C. The optical window has a built-in dew heater and the CMOS chamber is protected from internal humidity condensation.

QHYCCD offers a variety of mechanical adapters for the QHY128C allowing it to fit a broad range of accessories, including the QHYCCD OAG, 0.5mm-27.5mm flexible back focus adjust spacer, 2-inch T-ring, IR filter holder and more. In addition we can custom make adapters to suit your particular application

As a further enhancement to trouble free imaging, the 128C is equipped with a 128MB DDRII buffer which is greater than one full frame and is ideal for buffering the image in the camera. It helps tremendously with slower computers and also USB2.0 connections where it improves the data transfer stability and flow control.

It should be noted that unlike the mono QHY cameras, the 128C does not feature a connector to power a QHY filter wheel. You may think that a filter wheel is unecessary, however it may be preferable to use the camera with Light Pollution, UV/IR or Multi-Spectral filters. As such a filter wheel becomes necessary. Use of a QHY wheel is easily accomodated through a simple Y splitter power cable.


Model QHY128C

Sensor SONY IMX128 Full Frame Colour CMOS Sensor

AR Coating On CMOS chamber Yes. Multi-layer AR coating

Pixel Size 5.97µm x 5.97µm

Effective Pixel Area 6036 x 4028 pixels

Effective Pixels 24 megapixels

Effective Image Area 36mm*24mm

Fullwell 74ke-

AD Sample Depth 14bit (output as 16bit and 8bit)

Full Resolution frame rate 5FPS@14BIT

2160lines (eg.7400 x 2160,4096 x 2160) 9FPS

1080lines(eg.7400 x 2160,1920 x 2160) 16.5FPS

768lines(eg.7400 x 768,1024 x 768) 22.5FPS

480lines(eg.7400 x 480,640 x 480) 32FPS

Readout Noise 1.8e- to 4e- (2.7e-@unity gain)

Maximum Dynamic Range >17000:1 (More than 14 STOP's)

Dark Current 0.0006e/pixel/sec @ -15C

Exposure Time Range 60us-3600sec

Anti-Glow Control Yes, Zero Glow

Shutter Type Electric Rolling Shutter

Computer Interface USB3.0

Built-in Image Buffer 128MByte DDR2 memory Non-volatile memory / On camera storage Build-in total 512Kbytes Flash Memory. 100Kbytes user-accessible space for stellar ROI frames for analysis of exoplanet investigation, occultations, atmospheric seeing messurement, focus , optical analysis etc. Support 100 x100 image x 10 frames 50 x 50 image x 40 frames. 25 x 25 image x 160 frames 10 x10 image x 1000 frames (total frame numbers is based on 8bit image

Cooling System Dual Stage TEC cooler(approx -35C° below ambient*

Anti-Dew Heater Yes

Silicon Gel Socket Yes

Telescope Interface M54/0.75 Female Thread on the fast installer/center adjust ring

Optical Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating (Camera needs a UV/IR filter in the light path)

Back Focal Length 18.5mm from face

Weight 788g

Power Consumption ~ 30 Watts @ 100% TEC. 13 Watts @ 50%TEC

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