The ZWO ASI4400MC Pro Cooled Colour Astronomy Camera is a powerhouse designed for astrophotographers who demand the widest possible field of view without compromising on detail. At its core lies a back-illuminated full-frame sensor (36x24mm) boasting 44 megapixels and a 4.4μm pixel size. This massive format captures the entire field your optics can deliver—no cropping, no lost edges—making it perfect for sprawling nebulae and large galaxy clusters. With a 14-bit ADC and over 13 stops of dynamic range, the ASI4400MC Pro preserves the natural colour of bright stars while simultaneously revealing the delicate, faint structures of deep-sky objects in a single exposure.

Engineered for long-exposure reliability, this camera features a powerful two-stage TEC cooling system that lowers the sensor temperature by up to 35°C below ambient, dramatically reducing thermal noise for clean, smooth backgrounds. ZWO has equipped the unit with 512MB of DDR3 memory to ensure stable data transmission via USB 3.0, eliminating amp glow issues through proprietary hardware suppression. Practical features like an integrated polyimide anti-dew heater and a sensor tilt adjustment plate ensure your imaging sessions run uninterrupted and your stars remain sharp from corner to corner. Whether you are chasing the Milky Way core or faint dust lanes, the ASI4400MC Pro delivers professional-grade results.

Key Features

• Full-Frame Dominance: Features a massive 44MP sensor (36x24mm) with 4.4μm pixels, delivering exceptional resolution and field of view.

• High Dynamic Range: A 14-bit ADC provides over 13 stops of dynamic range, capturing bright highlights and faint shadows without clipping.

• Advanced Cooling: Two-stage TEC cooling lowers sensor temperature by 30°C–35°C below ambient, ensuring ultra-low dark current and noise.

• Glow Suppression: ZWO proprietary hardware technology effectively controls sensor glow, ensuring clean dark frames and images.

• Stable Performance: Built-in 512MB DDR3 memory buffer ensures fast, stable data transmission and prevents dropped frames during long exposures.

• Smart Features: Includes an integrated anti-dew heater to prevent frost and a sensor tilt plate to ensure perfect corner-to-corner star alignment.

• Deep Wells: A full-well capacity of 74,600e- supports exceptional dynamic range and star colour retention.

 

What's in the Box

• ZWO ASI4400MC Pro Camera Body

• 2-Inch Silicone Dust Cover

• M48-M48 Extender (16.5mm)

• M54-M48 Extender (21mm)

• M42M-M48F Adapter

• USB 3.0 Cable (2m)

• 2x USB 2.0 Cable (0.5m)

• Hex Key (Allen Wrench)

• Quick Guide

• Camera Bag

Full-Frame 44MP Sensor

The ASI4400MC Pro utilises a back-illuminated full-frame sensor (36x24mm) with 44 megapixels and 4.4μm pixels. This massive format captures the entire field of view your optics can deliver without cropping, while a high full-well capacity ensures exceptional dynamic range for both bright stars and faint nebulae.

High Dynamic Range

Featuring a 14-bit ADC, this camera delivers over 13 stops of dynamic range to capture bright highlights and faint shadows in a single exposure. This preservation of tonal information results in natural, well-balanced images with rich colour depth and flexibility for post-processing.

Two-Stage TEC Cooling

A powerful two-stage TEC cooling system lowers the sensor temperature by 30°C to 35°C below ambient. This dramatically reduces dark current and thermal noise, ensuring clean, smooth images with a high signal-to-noise ratio even during long exposures.

USB 3.0 & DDR3 Memory

The camera includes a high-speed USB 3.0 interface paired with a 512MB DDR3 memory buffer. This ensures fast, stable data transmission and eliminates dropped frames, providing reliable capture performance for both long exposures and high-speed downloads.

Integrated Anti-Dew Heater

A built-in polyimide heater prevents dew and frost buildup on the protective window, ensuring clear imaging throughout the night. It draws minimal power (approx. 5W) and can be toggled off via software to conserve energy when conditions allow.

Sensor Tilt Adjustment

The front plate features a sensor tilt adjustment mechanism with push-pull screws to fine-tune alignment with your telescope’s optical axis. This helps correct slight tilt, ensuring stars remain round and focus stays sharp all the way to the edges of the full-frame sensor.

HCG Mode Performance

To maximise sensitivity without adding noise, HCG (High Conversion Gain) mode automatically activates at gain 136. This greatly reduces read noise while maintaining high dynamic range, making it easier to capture clean, detailed images of faint targets.

High Quantum Efficiency

The advanced back-illuminated sensor structure delivers high sensitivity with a peak Quantum Efficiency (QE) of 80%. This efficient light collection allows for shorter exposure times and better signal quality when imaging faint deep-sky objects.

UV-IR Cut Filter

Full Specifications

Type	Cooled Colour
Sensor Type	Full-Frame CMOS (Back-illuminated)
Sensor Size	36 x 24mm
Pixel Size	4.4 μm
Format	Full Frame
Resolution	44 MP
Zero Amp Glow?	Yes
Delta T	30°C-35°C below ambient
Memory Buffer	512MB DDR3
Shutter	Rolling Shutter
QE Peak	80%
Full Well	74,600e-
Back Focus	17.5mm
ADC	14-bit
USB	3.0
Weight	700 g

Telescope Connections

Mechanical Diagram

Recommended Accessories

	ZWO 12V 5A Power Adapter for Cooled Cameras Used to power your compatible ZWO cooled camera or electronic device.
	ZWO Desiccant Tablets for Cooled Cameras Replace used dessicant tablets as required with the ZWO Dessicant Tablets for Cooled Cameras to keep your cooled camera functioning optimally.
	M42 T-Thread Spacer Ring Kit Add a M42-T-Thread Spacer Ring Kit to adjust backfocus spacing as required. Comes with 4 convenient sizes.
	ZWO 7 Position 2-inch Electronic Filter Wheel Add 7 of your favourite filters into an electronic filter wheel to swap between them automatically. Suitable for 2" threaded filters.

	ZWO 12V 5A Power Adapter for Cooled Cameras Used to power your compatible ZWO cooled camera or electronic device.
	ZWO Desiccant Tablets for Cooled Cameras Replace used dessicant tablets as required with the ZWO Dessicant Tablets for Cooled Cameras to keep your cooled camera functioning optimally.
	M42 T-Thread Spacer Ring Kit Add a M42-T-Thread Spacer Ring Kit to adjust backfocus spacing as required. Comes with 4 convenient sizes.
	ZWO 7 Position 2-inch Electronic Filter Wheel Add 7 of your favourite filters into an electronic filter wheel to swap between them automatically. Suitable for 2" threaded filters.

 

About ZWO Optical

Astrophotography has never been easier.

Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou China. They focus on building and innovating ground-breaking CMOS cameras such as the iconic ZWO ASI120MM Monochrome CMOS camera (the first-ever planetary CMOS camera to beat a CCD in the early 2010s). ZWO continues to pioneer new astrophotography technology with revolutionary features to capture exceptional quality of images of space that will last you a lifetime. Today, ZWO cameras are recognised by every passionate astrophotographer and are available in over 25 countries internationally.

Product Code: ZWO-ASI4400MC-P