QHY183 Colour Camera
QHY
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20 Megapixel, High Res, High QE, Back-Illuminated Cooled COLDMOS Camera
The QHY183C is a one-inch, 20 Megapixel back-illuminated colour CMOS camera with a peak QE of 74%. The pixel size is 2.4um, yielding high-resolution with modest size telescopes. The camera is capable of producing 15FPS@20 Megapixels. It has a two-stage TEC that cools the sensor to -40C to -45C below ambient. The ADC is 12-bit / 16-bit with 1e- read noise! The computer interface is USB 3.0 and exposure times can be set from 50us to 3600sec.
Sony's Image Sensor Exmor R is a back-illuminated CMOS image sensor with improved sensitivity and noise reduction - the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It retains the advantages of CMOS image high-speed operation while dramatically improving sensitivity.
The QHY183C has a 128MB DDR Memory Buffer. A QHY183M 16-bit image is about 40MB, so 128MB of memory can easily buffer a full frame for transfer to the computer using QHY183M software with native single-frame shooting function, instead of intercepting a frame from a continuous video transmission. This makes data transfer to the computer stable and reliable because there is no USB bandwidth or busy CPU problems.
The QHY183C utilizes the Anti-Dew features common to the QHY COLDMOS cameras. A heated optical window prevents exterior dew from forming, and the CMOS chamber has a desiccant plug socket to prevent moisture from forming on the sensor at cold temperatures.
The QHY183C incorporates QHY's Anti-Amp Glow technology to significantly reduce typical CMOS amplifier glow to a minimum, allowing excellent calibration by subtracting a dark frame.

QHY183M Colour Specifications
Attribute | Details |
---|---|
Model | QHY183M/C |
CMOS Sensor | SONY IMX183 |
Mono/Color | Colour |
FSI/BSI | BSI |
Pixel Size | 2.4μm x 2.4μm |
Effective Area | 5544 x 3684 |
Effective Pixels | 20 Megapixels |
Sensor Size | Typical 1 inch (13.3mm x 8.87mm) |
AD Sample Depth | 12-bit (output as 16-bit and 8-bit) |
Fullwell | 15.5ke- |
Frame Rate |
Full Resolution: 19FPS@8bit, 7.5FPS@12bit ROI: 4096 x 2160 (4K HD Video): 31FPS@8bit, 12FPS@12bit 1920 x 1080 (HD Video): 60FPS@8bit, 24FPS@12bit 800 x 600 (SVGA): 106FPS@8bit, 42FPS@12bit 640 x 480 (VGA): 130FPS@8bit, 53FPS@12bit |
Readout Noise | 2.7e-@lowest gain, 1.0e-@high gain |
Dark Current | 0.0024e-/pixel/sec @ -15℃ |
Exposure Time Range | 50μs - 3600sec |
Unity Gain | 10 |
Anti-Glow Control | Amplifier Glow can be reduced during long exposure |
Shutter Type | Electronic Rolling Shutter |
Computer Interface | USB3.0 |
Built-in Image Buffer | 128MB DDR2 Buffer |
Cooling System | Dual Stage TEC cooler (-40℃ below ambient, test temperature +20℃) |
Optic Window Type | QHY183M: AR+AR High Quality Multi-Layer Anti-Reflection Coating QHY183C: IR-Cut Filter |
Telescope Interface | M42/0.75 |
Back Focal Length | 17.5mm (±0.2) |
Anti-Dew Heater | Available |
Weight | 650g |
Let customers speak for us
from 139 reviewsMy first purchase as I am new to stargazing. These binoculars a great start. Quality product at a good price. Looking forward to my next purchase as I look for even better views.

Bought this for archery. It is heavy but what that’s what I wanted. It is solid in the ground and will not be blown over. I have accidentally knocked it with my bow when shooting and the scope has not moved a millimetre. Perfect!

I purchased this as a mount for an 80mm refractor. The aim was for something relatively portable that could be used in the field. So far it works well and should be ideal for the job. Being able to control the mount with an iPad using Commander Lite is helpful.

It’s my first scope, so it’s baby steps when the sky allows

The QHY MiniCAM8M with the IMX585 sensor and a full set of LRGB and HOS filters is the perfect way to get into mono imaging. It got me into it ;-)
The resolution of a mono camera is fantastic and works perfectly with my Askar 103 APO refractor.
My first LRGB was only 2h integration (clouds!) but would have been impossible with my OSC (ASI294MC): https://app.astrobin.com/u/Z3ph0d?i=id2xfw

I bought this book on a whim when I popped into the store (to buy an eye piece), not expecting too much ... instead I was pleasantly surprised, it is a great book, very interesting, and really well written so that novices like me can understand it too! I thoroughly enjoyed reading this book and keep using it as a reference guide for my stargazing nights. Highly recommended!

This was the first time I walked through the door (after only recently picking up my love for astronomy again) and the service, advice and prices were great! I’ll be back!
Maarten
Auckland

Thank you Andrew and team. Purchased as a gift. Customer service was excellent and product was perfect.
Highly recommend.

Team very willing to help, quick transaction, fast shipping, products as described, would purchase again or recommend to a friend :)

As always first class transaction.

I've used this on my 8" ASTRONZ Cassegrain and it gives a fairly sharp image across most of the field of view. Being a long focal length telescope at 2436mm I wanted an eyepiece that gives me that little extra field of view when compared to my other 30mm eyepiece.
