ASI178MM (mono)



Back-illuminated  CMOS Image Sensor with 14bit ADC 
ASI178MM has a 1/1.8″ and 6.4M pixels sensor IMX178 with SONY STARVIS and Exmor R Technology.
Extremely low read noise(2.2e -1.4e) , high sensitivity and 14bit ADC make it very suitable for astronomy and microscopy photograph

SKU: ASI178MM Category:

Product Description

Back-illuminated  CMOS Image Sensor with 14bit ADC. ASI178MM has a 1/1.8″ and 6.4M pixels sensor IMX178 with SONY STARVIS and Exmor R Technology.

Extremely low read noise(2.2e – 1.4e) , 1.44 @27db, high sensitivity and 14bit ADC make it very suitable for astronomy and microscopy high resolution photograph.

Come with a 2.5mm all sky lens which can provide a nearly 170° view of the sky.


Relative QE Curve


Super Low Read Noise

178 Gain RN DR FW vs gain

What`s in the box?


1–ZWO ASI078MM or ASI178MC Camera Body

2–2 m long ST4 guider cable

3–1.25″ Cover

4–M42-1.25″ T-Mount

5–2 m long USB3.0 cable

6–Driver & Extra Software CD (Mac, PC&Linux Compatible)

Mechanical Drawing




Camera technical details

Sensor: 1/1.8” CMOS IMX178
Resolution: 6.4 Mega Pixels 3096*2080
Pixel Size: 2.4µm
Sensor Size: 7.4mm*5mm
Diagonal: 8.92mm
Exposure Range: 32µs-1000s
ROI: Supported
ST4 Guider Port: Yes
Focus Distance to Sensor: 12.5mm
Shutter Type: Rolling Shutter
Protect window: AR window
Operating System Compatibility: Mac, Windows, Linux
Interface: USB3.0/USB2.0
Bit rate: 14bit output(14bit ADC)
Adaptor: 2″ / 1.25″ / M42X0.75
Dimension: φ62mm X 36mm
Weight: 120g or 4.2 ounces (without lens)
Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%

Supported resolution

10bit ADC/14bit ADC
3096×2080 60fps / 30fps
2560×2048 62fps / 31fps
2048×1080 116fps / 58fps
1280×960 130fps / 65fps
800×600 204.7fps / 102.3fps
640×480 253.1fps / 126.5fps
320×240 479.7fps / 239.8fps
More resolutions can be defined by user

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. :


    it seems that Sony offers only IMX178LQJ sensor that is a color version and I’m wondering how you turn this sensor in monochrome version.

    Best regards

    • Sam Wen


      the mono version sensor from SONY called IMX178LLJ

  2. :

    the 178 mono no-cooled in how many days can I have in Italy, Thanks

    • Sam Wen


      it usually take 1 week

  3. :

    Can you give us information about der absolut (not relativ) QE of the 178 MM.

    • Sam Wen


      This is not provided by SONY
      we estimate the QE should be around 70%-80%

  4. :

    What is power jack need (dimensions) for this camera as cable is not delivered and info not provided

    • Sam Wen


      it’s 2.1*5.5 or 2.5*5.5mm power socket

  5. :


    What is the best pc configuration needed for these camera?

    • Sam Wen


      i3 i5 i7 intel computer with USB3.0 port is suggested
      SSD is required if you want to capture at the fastest speed

  6. :

    Does the gain/well depth mean that the camera has a wel depth of 15K e- at gain ratio 1:1?
    For example ASI174 its 3k e-.

    • Sam Wen


      you are correct

  7. :

    What are the dimensions in mm of the sensor in the Asi178 mm ?

    • Sam Wen


      It’s 7.4 x 5.0mm

  8. :


    I want to do ISS imaging and I am wondering if the rolling shutter will be an issue.
    Could you tell me how much time it takes for the shutter to go from the first to the last line, in 3096×2080 60fps mode?


    • Sam Wen


      I think rolling shutter may still have problem with such very fast target such like IIS
      so ASI174 is better for this, but you can try with 178 anyway

  9. :

    Also, am I right in assuming the sensor is read line by line?

    • Sam Wen


      yes, it’s rolling shutter

  10. :

    How suitable is the ZWO 178mm for Solar and Lunar imagine. Is it comparable to the 174? I would like to increase resolution while using shorter focal length without using a barlow.

    • Sam Wen


      yes, it is very suitable for solar and lunar imaging for your purpose
      smaller pixel size but higher resolution

  11. :

    Can I use Binning while shooting with the 178MM incase I am interested in shooting Deep Sky?

    • Sam Wen


      of course you can

  12. :

    What are the accessories that come with the camera? Does it come with a sensor protection glass? If yes, which one is it?

    • Sam Wen


      every ASI camera come with protect window
      it’s AR coated window

  13. :

    which one you would recommend , the Asi 178mm or 174mm for using on lunt 60mm solar scope? Thank

    • Sam Wen


      I think 174 better, you can capture the full disk of solar
      but 178 maybe not

  14. :

    Hello, Im recently received asi 178 mm. Can I simultaniously use this camera for guider and photography ?

    With best reg. Peju

    • Sam Wen


      you can use it in this way for planetary imaging
      but not DSO imaging

  15. :

    Is there any chance to connect to ASI178MM Nikon lense? Do you have any adapter like for ASI1600MM?

    • Sam Wen


      yes, you can use the adapter for 1600
      just cannot add the EFW

  16. :

    you mean i can’t use filter wheel right (EFW)?
    Is there any item that will allow me to mount it to tripod?

    • Sam Wen


      you cannot use the EFW and 178 and NIKON lens at the same time
      there is 1/4″ screw under the camera body, just mount it to tripod

  17. :

    Hi Sam,

    how is the quantum efficiency of the ASI178mm compared to the ASI178MC? Can I compare the two graphs of the relative quantum efficiency?
    An example: At 400nm the ASI78MM has a relative quantum efficiency of 70%. The ASI178MC has a relative quantum efficiency of 46% (B), 10% (R) and 8% (G) at 400nm. The bayer matrix is made of 1 blue, 1 red and 2 green pixel. So i can add 46% + 10% + 2*8%, that gives 72%. But thats the relative quantum efficiency of 4 pixels, so 74%/4 is approximately 20% quantum efficiency per pixel at 400nm. That means, that if the ASI178MM and ASI178MC have the same absolute quantum efficiency, the ASI178MM is at 400nm more than three times more sensitive than the ASI178MC. Is this consideration right?

    Thank you very much!

    • Sam Wen


      usually QE of mono camera is around 10% higher than mono camera
      but color sensor don’t respond to all color
      mono sensor is around 3 times sensetive

  18. :

    Hi Sam, Is there any problem of vignetting using this cam and the EFW mini with fast scopes?


    • Sam Wen


      no, the sensor of 178mm is very small and won’t have any problem with vignetting

  19. :

    Hi, could you please post here 5 min dark with this camera taken at room temperature? I’m curious how will it look like because I want to buy a DSO camera that I could afford :)

    • Sam Wen


      there is very small amp-glow with 5 min dark
      I think you can consider it

  20. :

    Hello, I want to search for asteroids and choose between 178mm and 290mm cameras, tell me, is it better for this camera with a higher resolution and a small pixel (178mm) or a smaller resolution and a large pixel (290mm)? Thank you.

    • Sam Wen


      I think 178mm is better because you can bin2

  21. :

    Hello, tell me, are you planning to do a ZWO hyperstar for telescopes?

    • Sean Wang


      Not yet, Andrey. It’s not our strangth, hyperstar need design with telescopes.

  22. :

    Hi. I want to make all sky camera for taking milky way and meteor.
    But I don’t have enough knowledge to understand the camera’s performance.
    Currently, I thinking to buy ASI178MM or ASI185MC models.
    Anyway I have two questions.
    1. I want to shoot meteors and milky way. Which camera is better? color or mono? I think mono is better in terms of noise and sensitivity.
    2. I don’t have much budgets, so I think the comparatively inexpensive ASI185MC model is better to me. However, if the performance of the ASI178MM is overwhelming, then I will buy ASI178MM.
    Based on these two questions, which model would you recommend?

  23. :

    which is better in ASI178MM, ASI178MC, or ASI185MC for shoot meteor and milky way?

  24. :

    I have a medical use I would like to test this camera for…what is the lens mounting type? Can it be ordered with s or c mount types if requested?

    • Sean Wang


      between telescope and EFW will be better.

  25. :

    The Specifications says it has a AR window but does not say if the AR window is clear or is a UV/IR cut. Does the camera come with a UV/IR filter or does it need one? I see a UV/IR Cut filter listed in Recommended Accessories.

    • Sam Wen


      AR window always mean clear window
      you need to use extra UV/IR cut filter

  26. :

    Is it possible to set the bit depth to say 8 bits and get an even higher FPS?

    • Sam Wen


      you can set “high speed” mode to make the fps faster

  27. :

    We want to use imx178 for traffic application.
    Can we program this camera’s exposure time and gain?
    Does it support GigE Vision?
    Do you have c mount version? ( this looks like M12/board lens version?)

    • Sam Wen


      yes, you can control the exp and gain manually
      there is no GigE vision
      it’s CS mount come with 178
      you can use one 5mm CS-C extender to make it become C mount

  28. :

    Hi, is it possible taking pictures with 10 bit ADC ? And can it be set in firecapture or another program? I wanted better fps. Thank you.

    • Sam Wen


      just turn on “high speed” then the camera will use 10bit ADC and output faster fps

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