The ASI2600 Duo CMOS Camera combines imaging and guiding sensor in one compact body. The main sensor is the Sony IMX571 coming with a native 16bit ADC, 14stops dynamic range and 3.76um square pixel array. The readout noise is as low as 1.0e, and the full well capacity reaches an incredible level of 80ke. And it has no amp glow!

The guide sensor is the Type 1/1.8 SC2210 with excellent NIR sensitivity. The sensor size is 7.68mm x 4.32mm. It has 4umx4um pixels with an array of 1920x1080 and a full depth of 8780e.

The stars on the corner of the guide images affected by reducers back focus distance might not be very round. It is not due to the sensor tilt and will not affect normal use.

Please note that external power supplies are required for all ZWO ASI cooled cameras. Contact BINTEL for the correct power supply or advice to suit your ZWO camera.

Two-in-one design

Thanks to the compact design, the ASI2600MC Duo only needs one USB cable for control. It reduces potential cabling issues and improves setup speeds. You don’t need a separate OAG and guide camera.

Tilt Adjustment from Rear（Optional）

The 3 points from the rear make tilt adjustment much easier without the trouble of removing the tilt plate from the camera.

Performance improvement comparison

Guide sensor

The SC2210 sensor taken from the ASI220MM Mini camera features very high sensitivity. The QE peak value reaches 92% at 500nm. The readout noise is as low as 0.6e. As the new generation of guide sensor, it has achieved great results in guiding, proved by hundreds of astrophotographers.

Main sensor

The main sensor IMX571 features an APS-C format and 26MP total pixels. The size is 23.5mm in width x 15.7mm in height, and the diagonal is 28.3mm. The 3.76um x 3.76um small pixel size accommodates an impressive full depth of 50ke. With the new hardware technology, it is even extended to 80ke.

STARVIS technology

ASI2600 Duo CMOS Camera is based on Sony STARVIS technology. Sony’s back-illuminated CMOS image sensor improves sensitivity and noise reduction – the key factors to enhancing image quality.

Camera performance

Native 16bit ADC

This 16-bit ADC is not a CCD 16-bit ADC. It can really achieve a dynamic range output of 14stops, which will significantly improve the image sharpness and contrast, and also create smoother and more natural color transitions.

FPS

ASI2600 Duo CMOS Camera’s max FPS in RAW 8 mode at full resolution is 15FPS, which is even quicker compared to ASI2600MC Pro.

Extended full well mode

The full well capacity of ASI2600MC Duo is extended to 80ke, which is 1.6x larger than ASI2600MC Pro.

USB 3.0 & 512MB DDR3 buffer

With the match of USB 3.0 and 512MB DDR3 buffer, ASI2600MCDuo provides stable and secure data transmission that can effectively avoid frame-dropping issues during long exposures.

No amp-glow

Traditional CMOS sensors produce a weak infrared light source during operation quite often seen in the corner of uncalibrated images. It is the tell-tale sign of amp glow. As the ASI2600MM Duo uses zero-amp glow circuitry, you won’t have to worry about amp glow even when using high gain, long exposure imaging.

QE (Quantum efficiency)

Based on our testing results, the QE peak value of ASI2600MC Duo is over 91%.

Two-stage TEC cooling

Thanks to the two-stage TEC cooling, ASI2600MM Duo can lower the CMOS sensor temperature to more than 35 degrees Celsius below ambient temperature, which can greatly reduce dark current generation and sensor noise even during extended exposure times.

*The Delta T 35℃ is tested at 30℃ ambient temperature. It might get downto this when the cooling system is working for a long time. Also, as the ambient temperature falls, the Delta T would decrease.

What’s in the Box

Main Features:

Anti-dew

ASI6200 Pro comes with the polyimide heater that can avoid any dew problems.
The anti-dew heater which completely fit the protective window will heat it to avoid any dew problems.

Full Frame format

The ASI6200 Pro camera uses a full-frame format. The outstanding 9576x6388 resolution provided by the onboard Sony IMX455 sensor makes this camera a 61.2-megapixel full frame powerhouse! The sensor length and width are 36mm x 24mm respectively, and the diagonal is 43.3mm. This is a camera with a small pixel size of 3.76um that can accommodate a large well depth of 51.4ke.

Native 16bit ADC

ASI6200 Pro camera is our first batch of CMOS astronomy cameras with true 16-bit ADC. It is not a CCD-style 16-bit ADC – it really can achieve a dynamic range output of 14 stops. This significantly improves the image sharpness and contrast, and the contrast gradients are smoother and more natural-looking.

Built for astrophotography

USB3.0 & 512M DDR3 Memory
The ASI6200 Pro camera is equipped with a USB 3.0 transmission interface and a built-in 512MB DDR3 cache to ensure stable and secure data transmission.

QE value

The QE peak value of the ASI6200MC Pro camera is 80%.

Relative response（ASI6200MC Pro）

The QE peak value of the ASI6200MM Pro camera is 91%.

Ultra-low dark current

The unique dark current suppression technology can further reduce dark current noise. At a cooling temperature of 0°C, the dark current noise is only 0.0017e/s/pix. This means a 300s exposure will only cause a dark current noise of 0.51 e/pix, which is completely negligible!

Camera Details

Some images by ZWO users

The best solution of 55mm back focus length

Mechanical Diagram

What's in the box?

Full-Frame Products Comparison

The ASI4400MC Pro is the latest addition to ZWO’s full-frame deep-sky camera lineup.
Positioned between the ASI6200MC Pro and the ASI2400MC Pro, the ASI4400MC Pro strikes the perfect balance between image quality and efficiency, giving users a versatile option within the full-frame lineup.

Comparison Table:

Full-Frame for a wider field of view

The ASI4400MC Pro uses a full-frame, back-illuminated sensor measuring 36 × 24 mm with a 43.3 mm diagonal. With 44 megapixels and 4.4 μm pixels, it delivers incredible resolution and light sensitivity in every shot. The full-frame format lets you capture the entire field your optics can deliver - no cropping, no lost edges - perfect for wide-field targets and large deep-sky objects. Each pixel supports a full-well capacity of 74,600 electrons, providing exceptional dynamic range. Bright stars retain their natural color and detail, while faint nebula structures and galaxy arms remain beautifully visible. The result is cleaner, more balanced images with outstanding tonal depth across the frame.

High Dynamic Range, Capturing Both Highlights and Faintest Details

The ASI4400MC Pro features a 14-bit analog-to-digital converter (ADC) that delivers a dynamic range of over 13 stops. This wide range allows a single exposure to capture both bright highlights and faint shadow details without clipping. Whether you’re imaging bright stars, nebula cores, or the delicate wisps of distant galaxies, more tonal information is preserved for smoother gradients and richer color depth. The result is a natural, well-balanced image straight out of the camera, with plenty of flexibility for post-processing and fine-tuning.

Efficient Cooling, Protecting Image Quality

The ASI4400MC Pro uses a powerful two-stage TEC cooling system capable of lowering the CMOS sensor temperature by 30°C to 35°C below ambient. This deep cooling dramatically reduces dark current and thermal noise, keeping your images clean and smooth - even during long exposures that last several minutes. The result is higher signal-to-noise ratio and improved image quality in every frame.
Note: Cooling performance varies with ambient temperature. The lower the ambient temperature, the smaller the achievable differential. Results are based on tests at 30°C ambient. While not found often in Australia, operation below -20°C is not recommended.

Glow Suppression Function*

The ASI4400MC Pro camera features ZWO’s proprietary Glow Suppression technology, which effectively controls sensor glow and maximizes overall imaging performance. This technology is implemented directly at the hardware level and does not require any software intervention.

USB 3.0 & 512MB DDR3 Memory

The ASI4400MC Pro includes a high-speed USB 3.0 interface with a built-in 512 MB DDR3 memory buffer. This design ensures fast and stable data transfer while reducing the risk of dropped frames or transmission errors. The result is reliable image capture, even during long exposures or high-speed downloads.

Anti-dew

The ASI4400MC Pro features a built-in polyimide heater bonded to the protective window to prevent dew and frost buildup, ensuring clear and reliable imaging throughout the night. 

* The heater draws about 5 watts of power and can be turned off through the software when conditions allow, not only to save power but also to reduce the load on USB hubs and external power supplies. 

*While Glow Suppression significantly reduces CMOS sensor glow, it does not eliminate it entirely. A small amount of glow may still be present; however, with dark-frame calibration, it has no impact on the final image quality.

Sensor Tilt Adjustment

The ASI4400MC Pro includes three sets of sensor tilt adjustment screws. Each set has a push and a pull screw that let you fine-tune the sensor’s alignment with your telescope’s optical axis. This adjustment helps correct any slight tilt that can cause stars to appear elongated or out of focus toward the edges of the frame, ensuring sharp, even focus across the entire image.

Camera Performance

The ASI4400MC Pro offers a dynamic range of up to 13 stops, allowing it to capture both bright highlights and faint shadow details in a single exposure. This wide range is key to achieving high dynamic range (HDR) performance, preserving fine tonal transitions and subtle color detail in deep-sky images. When the gain setting reaches 136, the camera automatically activates HCG (High Conversion Gain) mode, which greatly reduces read noise while maintaining full dynamic range. This means you can increase sensitivity for faint targets without adding unwanted gain noise, making it easier to capture clean, detailed images under a variety of conditions.

QE Value

The QE peak value of the ASI4400MC Pro camera is 80%.

Ultra-low Dark Current

Thanks to the ASI4400MC Pro’s advanced cooling system, thermal noise remains extremely low even during long exposures lasting several minutes. Dark current is a small electrical signal created by heat inside the sensor rather than by incoming light. By keeping the sensor temperature low, the camera minimizes this effect, producing cleaner, higher quality images with smoother backgrounds.

UV-IR Cut Filter

The ASI4400MC Pro is equipped with a UV-IR cut filter mounted in front of the sensor. This protective filter blocks unwanted ultraviolet and infrared light that can cause star bloat and color distortion, allowing only visible wavelengths to reach the sensor. By filtering out these non-visible wavelengths, the camera produces sharper stars, more accurate colors, and overall improved image quality in astrophotography.

Product Details

Lightweight Body: 700g
Interface Layout: USB 2.0, USB 3.0, DC
Fan Position & Heat Dissipation Vents
All-Metal Red Body

Connection Method

Mechanical Diagram

What's in the box?

Note：

External power supplies are needed for all ASl-cooled cameras. We recommend you use a 12V@3A~5A DC adapter (D5.5×2.1mm, center pole positive) or a lithium battery with 11-14V to power the camera. If the voltage exceeds this range, the camera will activate its automatic protection mechanism.