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July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.
ZWO ASI294MC Pro Color

ZWO ASI294MC Pro Color

by ZWO
SKU ZWO-ASI294MC-P
$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00
Price Match Policy!
  • 11.7 Megapixel 4/3" Sony IMX294 Color CMOS Sensor
  • 4.63µm Pixel Size
  • Massive 63.7ke- Full Well Capacity
  • Extremely Low 1.2e- Minimum Read Noise
  • Two-Stage TEC Cooling with Anti-Dew Heater
  • 256MB DDR3 Onboard Image Buffer
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • ZWO ASI294MC Pro Color Cooled Astronomy Camera

    The ZWO ASI294MC Pro combines a high-resolution 11.7 MP Sony back-illuminated sensor with large 4.63µm pixels on a 4/3" format chip. Its massive 63.7ke- full well capacity and exceptionally low 1.2e- read noise capture extreme dynamic range in a single exposure, from faint nebulosity to bright stellar cores. The integrated 256MB DDR3 buffer ensures stable, drop-free data transfer over USB 3.0 at a full resolution frame rate of 16 fps with its 14-bit ADC.

    Sony 4/3" Sensor: 63.7ke- Full Well and 1.2e- Read Noise

    The heart of the ASI294MC Pro is its 23.2mm diagonal Sony IMX294 sensor, a proven performer for deep-sky imaging. The back-illuminated (BSI) architecture maximizes photon collection, while the large 4.63µm pixels are well-suited to a wide range of refractors and reflectors. Its greatest asset is the 63.7ke- full well depth, which allows you to take longer sub-exposures on targets with bright stars, like the Orion Nebula (M42) or the Hercules Cluster (M13), without saturating the stars and losing color information.

    Two-Stage Cooling and 256MB DDR3 Buffer

    Deep-sky astrophotography requires long exposures, where thermal noise from the sensor can degrade image quality. The ASI294MC Pro's two-stage TEC cooling system dramatically lowers sensor temperature, resulting in clean, low-noise images. A built-in anti-dew heater on the protective window prevents moisture from forming during humid nights. For data stability, the 256MB DDR3 memory buffer acts as a high-speed cache, preventing dropped frames that can occur with slower computers or heavy USB traffic, a critical feature when capturing hundreds of exposures for a final image.

    ASI294MC Pro vs. ASI533MC Pro: 4/3" vs. 1" Sensor

    While the ASI533MC Pro offers the benefit of zero amp glow, the ASI294MC Pro provides a significantly larger imaging canvas. The choice depends on your primary targets and telescope.

    • Sensor Format: The ASI294MC Pro uses a 4/3" rectangular sensor (4144 x 2822 pixels), giving you a wider field of view for framing large targets like the Andromeda Galaxy (M31). The ASI533MC Pro uses a smaller, 1-inch square sensor, which simplifies mosaic planning.
    • Resolution and Pixel Size: At 11.7 MP and 4.63µm pixels, the ASI294MC Pro samples the sky differently than the 9 MP, 3.76µm-pixel ASI533MC Pro. The larger pixels of the 294MC are often a better match for longer focal length telescopes, preventing oversampling.
    • Full Well Depth: The ASI294MC Pro's deep 63.7ke- well is a distinct advantage over the ASI533MC Pro's ~50ke- capacity, allowing for greater dynamic range in star fields.

    M42 Threads, 6.5mm Back Focus, and USB Hub

    The camera body features a standard female M42x0.75 thread for direct connection to your telescope's focuser or accessories. With a native back focus of only 6.5mm, you can easily integrate filter wheels, filter drawers, and off-axis guiders into your imaging train. The included T2-M48 16.5mm and 21mm extenders help you achieve the standard 55mm back focus distance out of the box. A built-in USB 3.0 port provides high-speed image download, while two additional USB 2.0 ports act as a powered hub, letting you connect your guide camera and electronic focuser directly to the ASI294MC Pro to simplify cable management.

  • What is the main advantage of the ZWO ASI294MC Pro's 4/3" sensor?

    The primary advantage is its large, rectangular field of view. With a 23.2mm diagonal, the 4/3" sensor is ideal for capturing expansive deep-sky objects like the North American Nebula (NGC 7000) or the Veil Nebula complex without needing to create a mosaic. This format is a significant step up from smaller 1-inch or 1/1.8-inch class sensors.

    How does the ASI294MC Pro perform on the Andromeda Galaxy (M31) with an 80mm refractor?

    An 80mm refractor with a focal length between 400mm and 600mm is an excellent match for the ASI294MC Pro. This combination provides a wide enough field of view to frame the entirety of the Andromeda Galaxy (M31), including its faint outer arms and satellite galaxies M32 and M110, in a single shot.

    Does the ZWO ASI294MC Pro suffer from amp glow?

    Yes, like many CMOS sensors of its generation, the ASI294MC Pro can exhibit some amp glow on very long exposures. However, this is a predictable pattern that is easily and completely removed during post-processing by subtracting properly matched dark frames, a standard part of any deep-sky imaging workflow.

    Is the ASI294MC Pro's 4.63µm pixel size a good match for an 8" f/10 SCT?

    At the native f/10 focal ratio of a typical 8" SCT (~2000mm focal length), the 4.63µm pixels would result in significant oversampling. To achieve a better image scale, you should use a focal reducer (typically 0.7x or 0.63x) with the SCT. This brings the focal ratio down to f/7 or f/6.3, making it a much better pairing for the ASI294MC Pro's pixel size and providing a wider field of view.

    What power supply do I need for the ASI294MC Pro's cooler?

    The two-stage TEC cooler requires an external power source. The camera's power input is rated for 12V @ 3A Max. A stable, regulated 12V DC power supply with at least 3A, and preferably 5A, is recommended. The camera electronics themselves are powered via the USB 3.0 connection (650mA at 5V).

    Why would I choose the ASI294MC Pro over the monochrome ASI294MM Pro?

    The ASI294MC Pro (Color) is for simplicity and efficiency. You can capture a full-color image in a single set of exposures, making it ideal for those with limited imaging time or who prefer a simpler workflow. The ASI294MM Pro (Monochrome) offers higher ultimate resolution and sensitivity, especially for narrowband imaging, but requires a filter wheel and at least three times the imaging time (for LRGB) to produce a color image.

  • SKU ZWO-ASI294MC-P
    Camera Series ZWO ASI294
    Sensor Sony IMX294 4/3" Back-Illuminated Color CMOS
    Resolution 4144 x 2822 (11.7 MP)
    Pixel Size 4.63 µm
    Sensor Dimensions 19.1mm x 13.0mm (23.2mm diagonal)
    Cooling Cooled, Two-Stage TEC
    Anti-Dew Heater Yes
    Image Buffer 256MB DDR3 Memory
    Bit Depth 14-Bit
    Max Frame Rate 16 fps at 4144x2822 (14-bit) / 19 fps at 4144x2822 (10-bit)
    Full Well Capacity 63.7ke-
    Read Noise 1.2e- to 7.3e-
    Shutter Type Electronic Rolling Shutter
    Exposure Range 32 µs to 2000 s
    ROI Support Yes
    Back Focus 6.5mm
    Telescope Interface M42 x 0.75
    Computer Interface USB 3.0 / USB 2.0
    Power Requirements Camera: 650mA @ 5V (via USB) / Cooler: 12V @ 3A Max (external)
    Weight 0.925 lb
    Operating Temperature -5°C to 45°C
    Storage Temperature -20°C to 60°C
    Operating Humidity 20% to 80%
    OS Compatibility Mac, Windows, Linux

    • ASI294MC Pro Cooled Color Camera

      × 1

    • Camera Bag

      × 1

    • USB 3.0 Cable

      × 1

    • USB 2.0 Cables

      × 2

    • 1.25" Nosepiece

      × 1

    • 1.25" Cover

      × 1

    • T2-1.25" Adapter

      × 1

    • T2-M48 16.5mm Extender

      × 1

    • 21mm Extender

      × 1

    • M42-M48 Adapter

      × 1

    • Spacers

      × 4

    • Quick Guide

      × 1

  • ZWO 2-Year Limited Warranty