
ZWO ASI2600MM Duo Monochrome Astronomy Camera
The ZWO ASI2600MM DUO Astroimaging Camera combines a high-resolution Sony IMX571 imaging sensor and SC2210 guiding sensor, delivering exceptional deep-sky imaging, precise tracking, low noise, and advanced cooling features.
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The ZWO ASI2600MM DUO Astroimging Camera is an incredibly versatile and powerful astroimaging camera that combines two critical functions into one compact device. It houses a dedicated imaging sensor for capturing good quality deep sky objects and a sensitive guiding sensor to ensure pinpoint tracking accuracy throughout those all-important long exposure shots.
Its Sony IMX571 APS-C back-illuminated CMOS sensor offers 26.2MP resolution, 14 stops of dynamic range, and an impressive 91% peak quantum efficiency, delivering stunning deep-sky images with minimal noise. The back-illuminated design enhances light capture by repositioning obstructive wiring, achieving a low 1.0-electron readout noise and virtually eliminating hot pixels.
Integrated alongside the imaging sensor is the SC2210 guiding chip, a 1/1.8" monochrome sensor known for its 92% quantum efficiency at 500nm and ultra-low 0.6-electron readout noise. It ensures precise auto-guiding, even through light pollution filters, by capturing a wide field of stars for accurate tracking corrections.
The SC2210 sensor captures a wide expanse of sky to ensure enough suitable guide stars are detected for precise auto-guiding calculations. But it's not just spatial resolution - the SC2210 delivers an eye-popping 92% quantum efficiency directly centred on the critical 500nm wavelength, granting it unrivalled sensitivity in the visible and near-infrared spectrum. And with an ultra-low 0.6 electron readout noise floor, it will unerringly differentiate those faint beacons from background noise and interference. The ASI2600MM DUO also features a built-in off-axis guider (OAG) for streamlined guiding and a two-stage thermoelectric cooler that chills the sensor up to 35°C below ambient, reducing noise during long exposures. A 5W dew-prevention heater protects the imaging cavity, ensuring clear operation in cold or humid conditions.
Despite integrating advanced dual sensor systems, the ASI2600MM DUO is remarkably streamlined and simple to integrate. A USB 3.0 connection with its blazing 5Gbps bandwidth handles all image download and camera control commands over a single cable. Seamless plug-and-play operation at up to 3.51fps ensures you'll never miss those fleeting deep-sky moments. But ZWO didn't stop at just simplifying the main computer link - the integrated powered USB 2.0 hub with two accessory ports further declutters cable management. Filter wheels, focusing units, guiding cameras, and more can all piggyback conveniently from the camera's central USB hub.
Keeping that sensor at a very cold temperature is essential for minimising noise when you're exposing for hours on end capturing faint celestial objects. The ASI2600MM DUO has a two-stage thermoelectric cooler, capable of chilling the sensor package down to 35°C below ambient temperature! With a 512MB DDR3 buffer to store incoming image data, you'll never lose those precious long exposures due to an interrupted download to the computer.
Camera Performance
STARVIS technology
ZWO has untilised Sony's STARVIS technology to reduce amp glow. This is because the ASI2600MM Duo's sensor uses a zero-amp glow design, thus eliminating amp glow when taking images with high gains or long exposures.
Full Specifications
Imaging Sensor |
Type | Monochrome |
Sensor Type | IMX571 |
Sensor Size | 23.5x15.7mm |
Pixel Size | 3.76µm |
Read Noise | 0.9e - 4.2e |
Resolution | 6248x4176 |
Max Framerate | 15 (RAW8) |
Zero Amp Glow? | Yes |
Delta T | 30-35°C below ambient |
Memory Buffer | 512MB DDR3 |
Shutter | Rolling |
QE Peak | 91% |
Full Well | 50,000 e- (extended to 73,000 e-) |
Back Focus | 17.5 mm |
ADC | 16-bit |
Protecting Window | D60-2 IR Cut |
Exposure Range | 32µs-2000s |
USB | USB 3.0 / USB 2.0 |
Adapter | 2" / 1.25" / M54 x 0.75 |
Weight | 700g |
Guide Sensor |
Type | Monochrome |
Sensor Type | SC2210 |
Sensor Size | 1/1.8" 7.68x4.32mm |
Read Noise | 0.6e |
Resolution | 1920x1080 |
Max Framerate | 14 |
QE Peak | 92% |
ADC | 12-bit |
USB | 2.0 |
Mechanical Drawing
Solutions for 55mm back focus legnth
Recommended Accessories
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: ASI2600MM-DUO
Colour / Monochrome | Monochrome |
---|---|
Sensor Type | Sony ExMor IMX571 APS-C |
Sensor Size | 23.5 mm x 15.7 mm |
Resolution | 26 Megapixels 6248 x 4176px |
Pixel Size | 3.76 µm |
ADC | 16 bit |
Read Noise | 1.0e ~ 3.0e (@ 30 dB) |
USB | USB 3.0 / USB 2.0 |
FPS | 15fps |
Shutter | Rolling Shutter |
QE Peak | 91% |
Full Well | 50,000 e- (extended to 73,000 e-) |
Exposure Range | 32µs-2000s |
Back Focus | 17.5mm |
Power | 12V 5A |
Operating System Compatibility | Windows, Mac OSX, Linux |
Cooled? | Yes |
Usage | Guiding, Deep Sky Imaging |
Camera Weight | 700g |
Warranty Information | 2 years |
Image | Item | Qty |
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ZWO ASI2600MM DUO Monochrome Astronomy Camera | 1 |
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USB 2.0 Cable (0.5m) | 2 |
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USB 3.0 Cable (0.75m) | 1 |
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M54M-M54F (16.5mm) | 1 |
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M54M-M54F (21mm) | 1 |
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M54M-M48F | 1 |
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Hexagon Wrench | 1 |
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USB 3.0 Cable (2m) | 1 |
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Camera Bag | 1 |
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Quick Guide | 1 |
Q1. What is the standard backfocus distance for ZWO cameras?
All ZWO cameras have a standard backfocus of 55mm. This matches the optical design of most flatteners and reducers. Always check your reducer/flattener manual to confirm the required distance.
Q2. How do I achieve 55mm backfocus with a ZWO cooled camera?
Start with the camera sensor to flange distance, typically 17.5mm, then add spacers and accessories to reach 55mm total. For example: 17.5mm (camera), 21mm (M42 extension ring) or filter drawer, 16.5mm (M42-M48 adapter or OAG). This gives a total of 55mm.
Q3. How do I calculate backfocus when using a ZWO filter wheel?
ZWO’s 5 Position 1.25"/31mm/36mm filter wheels and filter drawers add 20mm-21mm of backfocus.
For a typical setup: 17.5mm (camera), 20mm (filter wheel), 16.5mm (M42 extension or adapter) for a Total = 54–55mm.
Q4. How do I set backfocus when using a ZWO OAG (Off-Axis Guider)?
The ZWO OAG adds about 16.5mm of backfocus. A sample setup might look like: 17.5mm (camera) + 16.5mm (OAG) +21mm (extension ring) Total = 55mm.
Note: The OAG prism needs to be aligned with the sensor for proper guiding.
Q5. How do filters affect backfocus with ZWO cameras?
Filters, especially in a filter drawer or wheel, shift focus slightly—typically 1/3 the thickness of the filter. For a 2mm thick filter, this means reducing the backfocus by about 0.66mm. ZWO already accounts for this in their 55mm recommendation, assuming standard filters are used.
Q6. What if my stars look distorted at the edges—could it be a backfocus issue?
Yes, coma, elongated stars, or blurry edges are common signs of incorrect backfocus. Double-check each spacer’s thickness, make sure components are properly threaded, and measure the total optical path to ensure it equals the required backfocus.
Q7. Do ZWO planetary and guide cameras require a backfocus setup?
No, uncooled ZWO planetary or guide cameras (e.g. ASI178MM, ASI662MC, ASI174MM Mini) are usually connected directly via 1.25" nosepiece and don’t require backfocus spacing unless used with optics (e.g. OAG or Barlow). They are focused by adjusting position in the focuser or OAG helical focuser.
Q8. What software can I use with my ASI camera?
The ASI Caemra range is compatible with a wide range of astrophotography software. You can use:
ZWO ASIAIR for a mobile-friendly, all-in-one imaging solution (requires ASIAIR Plus sold separtely), ZWO’s native Windows/Mac drivers with ASIStudio, third-party software such as NINA, SharpCap, APT, Sequence Generator Pro, and FireCapture, using ZWO’s ASCOM and native SDK drivers.
Make sure your software is updated to the latest version to ensure full support for this full-frame camera.
Q9. Does the ZWO ASI Cameras work with ASIAIR?
Yes, ASI cameras is fully supported by ASIAIR. You can control cooling (for cooled cameras), gain, offset, exposures, filters (if connected via EFW), and guiding through the ASIAIR mobile app. Be sure to keep ASIAIR firmware and the app itself updated for best compatibility.
Q10. What is the recommended gain and offset setting for the ASI cooled cameras?
This varies by target and sky conditions, but ZWO recommends:
Gain 100 for optimal dynamic range and low read noise
Gain 0 for maximum dynamic range in bright targets or longer exposures
Offset typically ranges from 30–50 but should be adjusted depending on your software and histogram.
Q11. Can I use my ASI Camera with a DSLR lens?
Yes, you may be able to use your ASI Camera with DSLR lenses using appropriate ZWO lens adapters (e.g. M54 to Canon EF/Nikon F). You will need to ensure proper backfocus and may need a manual or electronic lens controller for aperture/focus adjustments.
Q12. My software doesn't recognise my camera – what should I do?
Try the following:
- Install the latest ZWO native and ASCOM drivers.
- Check your USB 3.0 cable and port; use a powered hub if needed.
- Test connectivity with an alternative app like ASIStudio.
- Update your software or firmware (e.g. ASIAIR, NINA).