ASI174MM (mono)


BRAND NEW! ASI174MM/MC is our new camera designed especially for Sun and Moon imaging.

Free World Wide Shipping for cameras and accessories ordersabove 300 $.

Product Description

Our brand new ASI174MM CMOS Monochrome Imaging Camera is based on the Sony Exmor IMX174 2.35MP sensor with Pregius global shutter technology.

Sony IMX174 CMOS Sensor Features

  • The Sony IMX174 monochrome CMOS sensor that separates the ASI174MM from previous ASI models. This type 1/1.2” Sony CMOS image sensor, with a 5.86µm unit pixel in a 1936 x 1216 array, has a lot of advantages when taking high quality solar, lunar, planetary, and deep sky object images.
  • Pregius Global Shutter function with analog memory permits the scanning of all pixels simultaneously. The Sony IMX174’s global shutter function provides improved image quality by making sure images of moving objects avoid focal plane distortion. This is especially helpful when performing solar or lunar imaging. Bad seeing, wind, or movement can alter the image if the readout speed is not quick enough (< 30fps).
  • Sony Exmor technology uses column-parallel A/D conversion for high speed processing, low noise, and low power dissipation.
  • ROI, or Region of Interest Mode lets you capture up to 16 areas inside the effective pixels. This ability allows for even higher frame rates.
  • High speed imaging with a max of 164.5 fps at 10 bit ADC, and max of 128.2 fps at 12 bit ADC

ZWO ASI Camera Body

    The ZWO ASI174MM Monochrome CMOS Camera seems like a natural progression from the ASI120MM-S. It comes with high speed USB 3.0 port, standard 2″ M42 x 0.75 internal thread interface, 0.25″ tripod thread mount on the rear, an AR window and an ST4 Guide Port. With the ST4 Guide Port, you can use 3rd party software, like Maxim LD or PHD, to guide your mount for longer exposures.
    This camera can be used on just about any telescope and mount. The dimensions of the ASI USB 3.0 aluminum body are 62mm x 36mm, or 2.44 inches in diameter by 1.41 inches deep.

What’s in the box?

–ZWO ASI USB 3.0 Camera Body (not include the lens)
–M42-1.25″ nosepiece
–1.25″ Cover
–2 m long USB cable
–2 m long ST4 guider cable
–Driver & Extra Software CD (Mac, PC & Linux Compatible)




174 Gain RN DR FW vs gain

Camera technical details

Sensor: 1/1.2″ CMOS IMX174LLJ / IMX174LQJ
Resolution: 2.3Mega Pixels 1936×1216
Pixel Size: 5.86µm
Exposure Range: 32µs-300s
ROI: Supported
Interface: USB3.0/USB2.0
Bit rate: 12bit output(12bit ADC)
Adaptor: 2″ / 1.25″ / M42X0.75
Dimension: φ62mm X 41mm
Weight: 140g
Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%

Supported resolution

Binning 1×1:
12bit ADC:
Binning 2×2:
Binning 1×1:
10bit ADC:
Binning 2×2:

Before first usage of this product read manuals and install correct drivers and software.

To support our newest cameras: ASI071 and ASI1600

follow softwares newest version required

SharpCap V2.8.2325 and up

Firecapture V2.5.03 and up





  • Fast shipping: we will choose DHL, UPS, TNT, EMS etc to deliver it. Usually you will get your package in one week. We provide free fast shipping for order above $300 or charge extra $20 for order below $300.
  • Free air mail shipping: we will ship via DGM or China Post Registered Air Mail. It usually costs 2-3 weeks to reach US or Europe and costs 3-4 weeks to reach far places.
  • Customers from Brazil and Chile should leave a message to provide your CPF or CNPJ as your custom needs it.
  • Customers from Russia need to provide the name of your company.

Tracking site:


China air mail:


  • The price list on our website is USD without tax.
  • Please note that buyers areliable to pay tax involved, such as Import tax, VAT , customs handling fee, etc. The additional fees may be collected at time of delivery by courier.
  • For best local service we advise customers buy our cameras form local dealers.

Warranty and Return Policy

  • We provide 2-year warranty for our products, we will offer the repair service for free or replace for free if the camera doesn’t work within warranty period. After the warranty period, we will continue to provide repair support and service on a charged basis.
  • This warranty does not apply to damage that occurred as a result of abuse or misuse, or caused by a fall or any other transportation failures after purchase.
  • Customer must pay for shipping when shipping the camera back for repair or replacement
  • If you get a faulty camera, please contact us as soon as possible though email: Please describe the problem in detail and we will do our best to help you solve the problem. Most instances perceived problems are simply bad driver install or software configuration.
  • For customers who bought the camera from our dealer, dealer is responsible for the customer service for you.

Do you have uestion, answer or comment? Post here!

  1. :

    Where can I find information about the requiments for computer operation software (Windows, Mac) on your webpage? Does the camera also operate under Windows 7, 8 and 10 and older operating software?

    • Sam Wen


      Yes, our USB3.0 cameras support all platform and all windows systems
      but intel CPU and Intel USB3.0 Host controller is recommended

  2. :


    What is flange focal distance of asi174mm? I have Celestron EdgeHD, so placing the camera in right distance is so important.


    • Sam Wen


      the back focus is 17.5mm

  3. :

    ASI174MM driver seems not to work in Windows XP SP2. Is that correct?
    Connected ASI174MM camera is not recognized here.
    (At another laptop with Windows 10 the ASI174MM camera is working fine).

    • Sam Wen


      all ASI drivers works under all windows platform

  4. :

    I see an exposure range of 300 seconds. But a reseller speaks about 1000 seconds. Is it 300 seconds or more?

  5. :

    Does this camera have a buffer to help minimize dropped frames during high-speed imaging?

    • Sam Wen


      the buffer is very small, so dropping or not mainly depends on your PC side

  6. :

    Accroding to the specification, the working temperature is -5 ~ 45 deg. C.
    Does it mean the camera does not work at cold environment such as -20 deg. C?

    • Sam Wen


      yes, you need to warm the camera under such cooled enviroment

  7. :

    Sam, is the new batch available now?

    • Sam Wen


      more will come at next month

  8. :

    I see you skeep the question of Simon
    I see an exposure range of 300 seconds. But a reseller speaks about 1000 seconds. Is it 300 seconds or more?

    • Sam Wen


      it should be 300s, the cooled one support 1000s exposure

  9. :

    Any update regarding availability? thank you in advance

    • Sam Wen


      yes, it’s available

  10. :

    Does the ASI174 have the same amp glow reduction as the QHY174 version? Your service and software are better but the 1.25 size, amp glow reduction and short back focus are tempting… Will your low profile 1.25″ cover work?

  11. :

    Also Sam, I want a great camera for OAG guiding on my 2800mm SCT, Is the ASI174mm a good choice? My ASI224 has trouble getting a high enough S/N it seems, and the pickoff mirror on the ZWO OAG can take a little larger sensor or I can possibly drill it to almost 8mm. Any suggestions would be welcome! I assume the 174 would be at least twice the sensitivity, right?

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