New CS lens 2.8mm-12mm F1.4

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2.8mm-12mm F1.4 lens suitable for ASI120MM/MC

This lens has bigger diameter than the 2.1mm lens come with ASI120MM/MC ,very suitable for meteor capturing

SKU: ZWO-LENS-2.8-12 Category:

Product Description

CS lens2

2.8mm-12mm F1.4 lens is suitable for ASI120MM/MC,ASI290MM/MC and ASI224MC


This lens has bigger diameter than the 2.1mm lens come with ASI120MM/MC.

It is very suitable for meteor capturing.

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. :

    Hi, how does this lens compare to the 2.1mm lens regarding field of view? Do you get 180° on ASI224 when used at 12mm? Thanks

  2. :

    Sorry, I meant at 2.8mm, not 12mm. I would imagine that the field of view is smaller than with the 2.1mm.

    • Sam Wen


      yes, the field of view 2.8mm lens is smaller than the 2.1mm, around 100 degree

  3. :

    Can I use this lens for ASI178MC?
    How I connect C mount lenz to ASI178MC?

    • Sam Wen


      yes, you can use this lens, but there is blank corner as this lens is designed for 1/3″ sensor

  4. :

    I assume this lens will work OK with ASI120MM-S ?

    • Sam Wen


      yes, it’s suitable for ASI120MM-S

  5. :

    Can this lens be focused, as in closer and further away, or does it just have a fine focus adjustment like the included fisheye type lens on the ASI 120MC Also is this for sale from the USA?

    • Sam Wen


      yes, the focal length is adjustable
      you can buy from HPS or OPT

  6. :


    What is the field of view at 12mm?

    • Sam Wen


      I think around 30degree

  7. :

    can you provide full resolution sample image with a asi120mm/mc or asi224mc of the stars at 2.8mm and 12mm and maybe around 8mm?

  8. :

    I need to buy the adapter for ASI 224MC or it’s included?

    • Sean Wang


      CS adatper is come with 224mc.

  9. :

    I am confused with all the different adapter types. Can I use this lens on a 290mc-cool? If I need an adapter, which one?

    • Sam Wen


      no, the back focus of cooled camera is 17.5
      only C lens can be used

  10. :

    Will it work on a cool cam using a 5 mm spacer? I can’t find a c-mount lens on the site, they all seem to be cs-mount.

    • Sam Wen


      no, CS lens cannot work on C mount
      but C lens can work on CS mount with the 5mm spacer

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