ZWO ASI294MC Pro Cooled Colour CMOS Camera


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    ZWO ASI294MC Pro Cooled Colour CMOS Camera

    The ZWO ASI294 MC Pro deep space astronomy camera is the worlds first to feature Sony’s IMX294 CMOS sensor resulting in a superbly capable camera that aims to extend the capabilities of the fantastically popular ASI1600.

    • 4/3″ SONY IMX294 CMOS
    • Diagonal: 23.2mm
    • Array: 4144 x 2822
    • Pixel Size: 4.63 µm
    • Read Noise: 1.2e (@39db gain)
    • ADC: 14 bit
    • Full Well: 63.7Ke

    Product Description

    ASI294MC Pro



    The ASI294 is the first camera in the world equipped with the latest Sony sensor IMX294CJK.

    294MC Pro3

    Sony 10.71M-Effective Pixel Color CMOS Image Sensor (official description from Sony site), with a diagonal of 21.63mm (4/3 format). ZWO has refined the sensor and remolded it to increase the diagonal to 23.2mm with approximately 11.71M-Effective pixels (4/3 format).


    ▶High-Sensitivity Type 4/3 CMOS Image Sensor that Supports 4K for Astronomic Cameras and Industrial Applications

    The IMX294CJK sensor is the first in-house image sensor for astronomic cameras to adopt the 4/3 format and provides the necessary number of pixels for true 4k output at 120 frames per second (w/ ADC 10-bit output mode, the ASI294MC can run up to 25fps at 4k format when used with USB 3.0). In addition, the use of larger-sized pixels achieves SNR1s (link this to Sony’s page on SNR1s, so people know what it means) of 0.14 lx* which is very close to the value of the ASI224 (0.13 lx*).

    ▶Exceptional low-illumination performance

    Exceptional low-illumination performance of SNR: 0.14 lx is realized by use of a large-size optical system and by expanding the area per pixel to 4.63 µm. This makes the IMX294CJK ideal for astronomic camera market applications that require low-illumination performance.

    DDR Memory Buffer

    The ASI294MC Pro camera includes a 256MB DDR3 memory buffer to help improve data transfer reliability. Additionally, the use of a memory buffer minimizes amp-glow, which is caused by the slow transfer speeds when the camera is used with a USB 2.0 port.


    DDR memory buffer is the main difference between ASI “Cool” and “Pro” cameras.

    14bit ADC w/ 13 stops DR

    The ASI294 has a 14bit ADC unit, allowing it to achieve 13 stops of dynamic range. This is an excellent characteristic for deep sky imaging, which is inherently high dynamic range. At 13 stops, the ASI294 has even more dynamic range than the ASI1600.

    HCG Mode

    HCG (high conversion gain) mode, which reduces read noise to even lower levels at higher gain without loss to dynamic range, is automatically enabled when the gain setting is 120 or higher. Read noise will drop under 2e-, while dynamic range will remain at 13 stops.

    294 Gain RN DR FW vs gainFull well Capacity

    63700e full well, which is 3 times than ASI1600’s capacity. Even bright stars won’t saturate under long exposure.

    This camera can achieve higher SNR(signal to noise ratio) with just one single exposure.

    Reliable Mechanics

    ASI294MC Pro has same mechanics as ASI1600 Pro. There are four screws that seal the sensor chamber. Our camera design has been extensively tested and is very stable.

    Even when used in higher humidity environments, ASI294MC Pro will still work fine without dew problems.


    High QE

    The IMX294 sensor is a BSI (backside illuminated type) sensor, which has very high QE (quantum efficiency, which we estimate is over 75% peak).


    Dark Current

    The dark current of the ASI294 is slightly higher than the ASI1600, based on our test results.

    Dark frame sample @ Highest dynamic range settings, 300s, -10°C, bin1. Please check the dark frame to make sure you fully know the performance.

    ASI294MC Pro Dark Frame



    USB 3.0 Port & USB2.0 HUB

    USB 3.0 Port: Provide 5Gb bandwidth to make it possible for ASI294 Pro to run at 16 fps (14bit, normal mode) or 19 fps (10bit, high speed mode)  at full resolution(11.7Mega).

    Recommended cooler power supply: 12V @ 3-5A (or more) DC adapter (2.1×5.5mm, center pole positive). Also suitable: DC battery with 9-15V. Buy the power supply from Bintel too!

    Using a battery 9-15V is also suitable for the cooler power supply.

    USB 2.0 HUB: can connect with various accessories, such as filter wheel, guide camera and electronic focuser, so you can better manage your cables. The ASI294 Pro includes two short 0.5m USB 2.0 cables. The integrated USB 2.0 hub is powered by the external power source if you connect one.

    Cooling System

    The ASI294 Pro has a 2-stage TEC cooling system that enables deep cooling (35°C-40°C below ambient). The cooler requires an external power supply, which is not included with the camera. You may order a suitable power supply from Bintel here.

    Connecting Drawing


    1. M43-T2 adapter (optional)

    2. EOS-T2 adapter (optional)

    3. 2” Filter (optional)

    4. 1.25” T-Mount

    5. 1.25” Filter (optional)

    6. M42-1.25” adapter

    7. T2 extender 11mm

    Mechanical Drawing


    What is in the box?

    ASI294 Pro box includes all necessary cables, adapters, and manuals.

    294MC-Pro pakage list

    Notice:Cooled cameras need a 12v power adapter, If you don’t have one, please click this link to buy a 12V power adapter. There are 4 different standards for the different country, please choose it carefully.

    Drivers and Softwares:

    The ZWO website is always updated with the most recent camera drivers as well as software for DSO and planetary imaging. Please make sure the most recent drivers and software from the ZWO website has been installed before you start shooting:

    It is also recommended to read the manuals first before shooting.

    Product review:

    Camera technical details

    Sensor: 4/3″ SONY IMX294 CMOS
    Diagonal: 23.2mm
    Resolution: 11.7Mega Pixels 4144X2822
    Pixel Size: 4.63µm
    Bayer Pattern: RGGB
    Shutter:Rolling shutter
    Exposure Range: 32µs-2000s
    ROI: Supported
    Read Noise: 1.2e @39db gain
    QE peak: TBD
    Full well: 63.7ke
    DDRIII Buffer: 256MB
    Interface: USB3.0/USB2.0
    Adaptor: M42X0.75
    Protect window:AR window
    Dimensions: 78mm Diameter
    Weight: 410g
    Back Focus Distance: 6.5mm
    Cooling: Regulated Two Stage TEC
    Delta T: 35°C-40°C below ambient
    Camera Power consumption: 650mA at 5V
    Cooler Power consumption: 12V at 3A Max
    Working Temperature: -5°C—45°C
    Storage Temperature: -20°C—60°C
    Working Relative Humidity: 20%—80%
    Storage Relative Humidity: 20%—95%
    Max FPS at full resolution:
    10Bit ADC
    4144×2822 19fps
    14bit ADC
    4144×2822 16fps
    more resolutions are in software, support customize resolution.

    Have a question about this product?

      CALL NOW : +61 2 9518 7255 OR EMAIL BELOW

      bintel astronomy experts


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