ZWO NEW 1.25″ ADC (Atmospheric Dispersion Corrector)


SKU: ZWO-ADC Category:

Product Description

ZWO ADC is voted as  “HOT SKY PRODUCT – 2017” by SKY&TELESCOPE magazine!

ZWO Atmospheric Dispersion Corrector is used to reduces the effect of atmospheric dispersion on lunar and planetary images






The prisms are the heart of the ADC

Material: H-K9L(Schott BK7)

Surface Accuracy: λ/10@632.8nm

Deviation Angle: 2°


UV friendly AR Coating


Martin Lewis tells you what an ADC is and why do we need it?How to use it?

Here is a review of ZWO’s ADC by Martin Lewis.

Some test images show the difference between using ADC and without ADC

ZWO_ADC_jupiter post-42840-0-79519500-1448201306

Jupiter from Emil with ASI174MM and ZWO ADC



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. :

    What is the optical tolerance of the ADC?
    Is it T2 thread either side of the ADC?

    • Sam Wen


      both T2 female thread each side

  2. (verified owner):

    Is the ADC delivered as the picture above shows (including 1.25″ adapters on both sides) or only the “central body” itself?

    • Sam Wen


      it include 1.25″ adapters on both sides

  3. (verified owner):

    What’s the back focus?

    • Sam Wen


      the height of the ADC Body is 30mm

  4. (verified owner):

    Will you inform the customers when the second charge of ADC has arrived and you (re)start shipping the orders?

    • Sam Wen


      yes, we will
      we shipped all the orders today

  5. :

    What about the optical tolerance of the prism?

    • Sam Wen


      The surface PV is better than 1/10λ

  6. :

    How can I preorder the ADC and get it when avalaible? When is charged? When the item is sended or when you preorder it?

    • Sam Wen


      the ADC can be ready at middle of this month

  7. :

    you have the adc in stock , otherwise how long should you wait ?
    thank you

    • Sam Wen


      we have very few instock and send soon
      more will come at end of this month

  8. :

    Mine arrived today. Are there any instructions specific to this model or should I refer to generic ADC instructions I’ve found? thanks

    • Sam Wen


      you can find some instruction in our product description

  9. :

    Hi Sam,

    My optical train is 8se scope / GSO Focuser / ES 2x Focal Extender / ZWO Filter Wheel (w/ Astronomik LRGB filters) / ZWO ASI120MM-S camera.

    Where should I put the ADC in the chain? You can see a photo of my setup on Astrobin via the link below.

    BTW, all of my ZWO hardware works great! I am really looking forward to trying out the ADC to see if it can help improve my planetary images (and visual use)!



    • Sam Wen


      you need to put the ADC between 2X barlow and Filter wheel

  10. :

    Got it. Thanks!

  11. :

    Hi Sam,
    I just received the ADC yesterday. it’s a great looking product and do you have an operating manual?
    The instruction link on your product description is not functioning.


    • Sam Wen


      we are going to prepare one

  12. :

    Hi Sam, I’d also like to have an instruction manual. I bought the ADC without.

    • Sam Wen


      we are going to prepare one

  13. :

    You thought all HDMI cables are the identical?
    hermes kelly bag cheap

  14. :

    There’s some mechanical drawing of the ADC? I need it for an opto-mechanical design.
    Thanks in advance

    • Sam Wen


      we will try to upload in a few days

  15. :

    How do you adjust the ADC with a mono camera?

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