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 $.
SKU: ASI174MM Category:

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?





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.


  • Fast Shipping(amount ≧ 299USD) for free
  • Fast Shipping(amount < 299USD) : $20.00
  • Free Shipping(amount < 299USD) (Air Mail, 3-4 weeks) (Free)


  1. 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 ≧ $299 or charge extra $20 for order < $299.
  2. Free 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.
  3. Customers from Brazil and Chile should leave a message to provide your CPF or CNPJ as your custom needs it.
  4. 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?

    • Sam Wen


      yes, there is amp glow reduction
      just it’s not so effective as 224

      our low profile 1.25″ cover works with 174

  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?

    • Sam Wen


      Yes, 174 is the best one
      it is sensitive and large enough

  12. :

    Hi Sam

    I want to Know if this camera was tested as a guiding camera at OAG in a MEADE LX 200 12 inch OTA in native output

    • Sam Wen


      yes, you can use it as a guiding camera at OAG

  13. :

    Hi Sam,
    I already have the 224mc and the 290mm (love them both) and am looking for a camera that will have a larger field of view. Will I be disappointed with the 174mm for wider field planetary imaging? Clarification – will I see a difference in resolution when I running at critical sampling. What is the camera’s current availability? Thanks for your fine products!

    • Sam Wen


      I don’t think planetary imaging need larger filed of view except lunar or solar
      we have it in stock

  14. :

    Hi Sam,

    I ordered a ASI174mm but now I’m worried it not will achieve focus with your AOG and my ASI071. My calculations make me think the 174 will be short about 1 or 2 mm from achieving focus when pushed all the way in. I’m using your OAG with the 21.5mm extension so I can’t add more length there. What do you think? I don’t think your low profile 1.25″ cover will help me – right?

    • Sam Wen


      our OAG support all ASI cameras if the back focus of your system is 55mm

  15. :

    I’m loving the ASI174mm. It’s really fast with FireCapture and it is fine as the guide camera on your OAG – it focused up just fine. It also bins great too. I’m using the asi071 as the main camera with the 21.5mm extension with no additional extension on the 174.

    Would you use the D25 UV/IR cut window on the 174mm for OAG guiding or just use the supplied AR window?

    • Sam Wen


      you don’t need UV/IR cut window for guiding

  16. :

    i want to use Asi174MM + 7 position 36mm filter wheel with Canon Eos lens. As far i as i know Asi174MM has 17.5mm back focus . So is it possible to use EOS Lens Adapter for EFW & ASI1600 with additional 10mm spacer ? . Or if oyu have any suggestion to use 174MM+Filter Wheel+ EOS lens i’d be aprriciated

    • Sean Wang


      174 new version have 6.5mm back focus, just like 1600.

  17. :

    sorry for flooding this topic but is this camera has removable M42 extender like asi1600 ?

    Also in this page technical drawing shows it has 6.5mm backfocus which is incorrect. And also at the manuals its written that uncooled 174 has 12.5mm , cooled version has 17.5mm backfocus.

  18. :

    It looks like the smaller opening just above the sensor is threaded. Does that opening support a 1.25 threaded filter?

    • Sean Wang


      Yes, the camera can use 1.25 filters.

  19. :

    I am looking to control this camera(take photos, change exposure and such) using the command line or by writing some code to do it automatically every few seconds. Is there a program or something that would allow me to do this? Thanks.

  20. :

    I’d like to add a lens to it so I can use it as an all sky camera. do you have a lens that works for this?

    • Sam Wen


      no, this is one 1″ sensor you need one lens can match the size

  21. :

    Hi Sam,

    What are the requirements for a computer to use the maximum of this camera (processor, memory, SSD… ) ?

    • Sean Wang


      USB3.0 Port and SSD(depand on SSD speed, expensive SSD(support NVMe) will reach higher speed in write data).

  22. :

    I am looking at the ASI174MM for eclipse photography. Is there a way to attach this camera to a Canon EOS lens? Also, how does the sencer size compare to a full frame camera? Also, given the 2.3 mega pixels how much image enlargement is possible?

  23. :

    Hello Sean, Just bought these ZWO ASI174mm camera My CD has a small scratch that is preventing to read it’s content. Would you please let me know how to get it? I contacted the ZWO site they telling me they don’t have one. What? I don’t want to just down load it on line, I want the hard copy. Please help. Thanks in advance Great products Regards. : )

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