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 206 reviewsAs a stargazing newbie, I'm so glad I visited the showroom for advice! Andrew was super helpful and I'm very happy with my 8" Dobsonian :)
My comments are based on using it with a 102mm ED refractor, FL 714 mm. My home is in a Bortle 5 location in Christchurch.
This shorty Barlow is an apochromatic design, it uses a brass compression ring and is light at approx.100gms. I've used it several times in mostly poor viewing conditions, and once in above average conditions. In that time I viewed double stars, emission nebulae, open and globular star clusters, and Jupiter. I thought it provided excellent views and on the one occasion when seeing conditions and the city lights were less in the early morning, I was able to achieve 203 x magnification looking at a globular while still getting a reasonable view. Even at 238 x the view was tolerable, albeit quite soft.
I also have a Celestron X-Cel-LX 2X Barlow, so was able to compare the two Barlows. I found them pretty much identical in terms of colour, sharpness and contrast, though someone with better eyesight may notice differences that I can't.
I highly recommend the Astronz 2.5X Barlow, as it can provide substantially higher magnification options if you have, say 3 or 4 eyepieces. Personally, I prefer my 2 X Barlow as its more useful in less than average viewing conditions, which for me is most of the time. However, in above average to excellent viewing conditions, or at a dark sky site, the extra magnification of the 2.5 X Barlow would be very useful. If you are just starting out and wanting to get a Barlow, the Astronz one costs $48 cf. $249 for the Celestron. The choice is pretty much a no-brainer from that perspective.
I'll continue to use both, as different EP combinations and magnification steps will suit different viewing conditions.
The collimator arrived within 24 hours and was exactly what I needed. If didn't take long to realise the collimator itself needed to be collimated which was an easy process and added to learning how to use it. It was easy to use to collimate the Dobsonian Telescope. Thanks Astronz for helping me get underway with my new hobby.
I am so happy with the 8" Dobsonian. The fine focuser and the 2" superview lens where features which other beginner packages didn't have. I went to visit Andrew's store, he didn't confuse me or up sell, and he gave lots of time chatting and showing me the scopes, he gave advice for where to find dark skies and to come along to the societies meeting which introduced me to lots of great people and astronomy. I set the scope up within hours, within a week I had three amazing observing sessions, in dark skies not far from Auckland, the scope is simple and quick to set up and use and I am very impressed by how it has delivered beyond my expectations for power, useability and fun! Highly recommend Astronz
I am delighted to write a report for this product. It is extremely well made and combines a manual as well as electric function for focusing. This is important to me because with my other electric focuser, I was unable to use the telescope visually without having to dismount it. Now I am able to use it visually.
The focusing function allows very precise control. Unlike my previous focuser, there is now no problem from Schmidt Cassegrain mirror slop. I can now search for focus by adjusting in and out of focus and then when focus is found, set the counter to zero. I am a planetary imager and can now be very precise in searching for focus - even during a video capture. When experimenting beyond your "zero" point one can always return to that point precisely.
I have no hesitation in recommending it.
Cheers,
Paul Mallinson
Superbly easy to use and wonderful clear view while abl to clip on phone camera to other side made great photos
From what I’ve tried so far they seem amazing got a few more days to use them in Wellington NZ before we flight back to London so hopefully all good 👍 cheers Frank
I recently purchased the Celestron EdgeHD 8" Optical Tube Assembly from Astronz and had a very positive experience. The sales service was excellent, knowledgeable and provided helpful advice about the telescope and accessories before purchase. Astronz is run by experienced astronomers, which makes a big difference when discussing equipment and setup.
good quality and quick shipping. Andrew was great help.
Awesome definition, great contrast and sharpness.
Easy and reliable way to buy.
Perfect and helpful customer service.
The eye piece and the collimator are awesome.
Very happy with my purchase have been waiting a while to upgrade to the 2 inch family I have been using the eyepiece to veiw through a sct 8 inch so far have not been disappointed crisp clear images
A well built eyepiece of good quality good bang for your buck
I found a receipt yesterday from astronz dated 2004 in which I purchased a laser colminator which still works perfectly
Astronz still delivering excellent products at very competitive prices
Great product well made excellent optics value for money spent astronz excellent service and advice highly recommended
Great telescope and awesome service from Andrew over the holiday period - highly recommend