- Info
- Specifications
- Items included
- Downloads
- Reviews
The ZWO ASI 183MC PRO is a cooled colour deep sky camera with the Sony IMX183 CMOS colour sensor. The 183MC has 2.4 micron pixels, a sensor diagonal of 15.9mm and a resolution of 20.18MP.

The ZWO PRO cameras incorporate a 256MB DDR3 memory buffer that improves data transfer reliability and it minimizes the amp-glow caused by slow data transfer speeds.
The Sony’s back-illuminated Exmor R technology allows to push the ASI183 QE peak to a remarkable 84% (for the monochrome version). In Ha channel, the QE is over 60%.
A higher QE means more light converted into signal. Across the entire visible spectrum, the QE is never below 50%.

The USB 3.0 Port provides 5Gbps bandwidth and lets the camera run at 19fps (12bit, normal mode) or 19fps (10bit, high speed mode) at full resolution (20.18 Mega).
The USB 2.0 Hub allows to connect 2 USB controlled accessories such as a filter wheel, a guiding camera or an electronic focuser, reducing the amount of cables that run directly from your computer.
The 2 stages TEC cooling system allows a ΔT of 40°C-45°C below air temperature.
Note: All cooled ZWO cameras require an external power supply of 12V at 3-5A with a 2.1×5.5 mm connector (positive tip).
The dark current of the ASI183 is extremely low, based on our test results.

Sensor |
1″ CMOS Sony IMX183CLK-J/CQJ-J - colour |
Resolution |
20.18 Megapixels 5496 x 3672 |
Pixel size |
2.4 µm |
Sensor size |
13.2 mm x 8.8 mm (15.9 mm diagonal) |
Quantum efficiency |
84% |
Exposure range |
32µs-2000s |
Read noise |
1.5 ~ 3.0 e (@ 30 dB) |
Full Well Capacity |
15,000 e |
Bit rate |
12 bit |
Speed |
19 fps |
Shutter type |
Rolling shutter |
Cooling |
ΔT of 40°C-45°C |
Memory buffer |
256Mb DDR III |
ROI |
Supported |
Compatibility |
Mac, Windows, Linux |
Protecting window |
D32-2-AR coated |
Ports |
USB 3.0 / USB 2.0 |
Back focus |
6.5 mm |
Connections |
2" / 1.25" / M42 x 0.75 |
Dimensions |
Ø 78 mm; ↨ 77.5 mm |
Weight |
410 gr |
Power supply |
9-15V 3 A (2.1×5.5 mm connector) |
SKU |
ASI183MC-P |


1. M43-T2 adapter
2. EOS-T2 adapter
3. 2”Filter (optional)
4. 1.25” T-Mount
5. 1.25” Filter (optional)
6. M42-1.25” adapter (optional)
7. T2 extender 11mm


- Camera bag
- Camera body
- USB 3.0 cable (2 metres)
- 21mm extender (M42 male - M42 female)
- 16.5mm extender (M48 female - M42 male)
- 11mm M42 female extender (screwed to the camera)
- Nose piece (M42 male to 1.25" female)
- Internal adapter M42 (female) to M48 (male)
- 2x USB 2.0 cables 0.5m
- M42 male to 1.25" filter thread (necessary to connect a 1.25" filter inside the 11mm extender)
- 0.3mm spacer
- 0.5mm spacer
- User manual
- 1.25mm plastic cap
- Plastic cap for 11mm M42 extender
Camera has worked great so far. A big learning curve for using a dedicated Astro camera but so far I am enjoying it. Here is my first dso.
Ordered on Wednesday arrived Thursday and imaged that night!!
Very impressed by the small sensor and good fit to the Celestron Rasa8. Image 40 X 120Sec at gain 111. (Bias/Darks/Flats used)
Arrived safe and well boxed! Camera is perfectly working. Let's wait for clearer sky to test it adequately and give a more detailed feedback!
The camera works excellently out of the box under Linux. The package contains all necessary accessories. A special gadget is the flat USB3-cable. This one is very flexible so it doesn't transfer movements or vibrations to the telescope.