ZWO D21 AR protect window


D21 AR protect window
Free Shipping though China air mail!

SKU: ZWO-D21AR1 Category:

Product Description

AR clear window

ZWO D21″ AR protect window

Suitable Typy: ASI120 series , ASI120-S series, ASI178 series, ASI290 series, ASI224MC and ASI185MC cameras.

Protect the sensor from dust and humidity.

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. :

    I need a protective windows for ASI1600MM cooled please.

    • Sam Wen


      please contact us through email

  2. :

    I would like to purchase this for ASI120 MM. My question is how is it attached to the camera?

    • Sam Wen


      this is used to replace the old one on camera
      is your 120mm the newest version?

  3. :


    Not sure if mine is newest or not. I bought it used so it is probably year old. Is there a way to tell what version it is. I have the original box and all. Previous owner removed the glass to make it more sensitive but I think it makes dust go in. Want to protect the sensor with the glass protection.

  4. :

    Hi, What does “AR” stand for, please? What does it mean?

    • Sean Wang


      AR means AR coating, it is nearly all pass of light.

  5. :

    Anti-Reflective Coating,.. Thanks a lot!

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