ZWO ASI294MM Mono

Low-Light Performance

The IMX294CJK sensor is tailored for astronomy applications requiring outstanding low-light sensitivity. With a large 4.63 μm pixel size and back-illuminated design, the ASI294MM delivers detailed and noise-free images, even under challenging conditions.

Dynamic Range and Full Well Capacity

The camera's 14-bit ADC provides 13 stops of dynamic range, capturing a greater range of details in high-contrast scenes. The impressive 63,700e full well capacity prevents saturation of bright stars, ensuring excellent signal-to-noise ratios with single exposures.

ASI294MM Unlocked Bin1 Mode

Yet another perk of the ASI294MM is that the pixel size is switchable – you can switch between unlocked Bin1 mode and Bin2 mode anytime in your astrophotography software. The unlocked Bin1 mode changes the pixel size into 2.3um and increases resolution to 8288×5644. The ability to unlock bin1-mode was a popular request from our customers. Of course we listened to you and worked quickly to make it possible.

Remember that using Bin1 mode will decrease the full well capacity compared to the standard bin2-mode.

Unlocked Bin1: 12bit ADC, 2.3um pixel size, 47 megapixels, 8288*5644 resolution, 14k full well capacity.

Bin2: 14bit ADC, 4.6um pixel size, 11.7 megapixels, 4144*2822 resolution, 66k full well capacity.

If the sampling accuracy you get with the 2.3um pixel size falls within a reasonable range, then the unlocked Bin1 mode will help you get more object details. However, you will lose dynamic range and ADC bit depth. Also the image files you get at Bin1 will probably be around 4 times bigger than Bin2.

So in the end the unlocked Bin1 mode is double-edged, you may choose to use it or not depending on the specific circumstances during your imaging sessions.

High-Speed Operation

The USB 3.0 interface supports a frame rate of 16 fps at 14-bit normal mode and 19 fps at 12-bit high-speed mode, making the ASI294MM ideal for a variety of applications, from deep-sky imaging to fast planetary captures.

Quantum Efficiency (QE)

The IMX294 sensor’s high QE and back-illuminated structure maximize light collection efficiency, making it a versatile choice for astrophotography enthusiasts.

Setup Instructions

1. Connect the ASI294MM to your computer via the USB 3.0 port, which provides a 5Gb bandwidth for smooth operation at full resolution.
2. For guiding, link the camera to your mount’s auto-guide port using the ST4 port.
3. Adjust gain settings to suit your imaging needs. When set above 120, the HCG mode will engage automatically, reducing readout noise.
4. Use appropriate filters or accessories to optimize imaging for specific targets or conditions.