ZWO LRGB Filters (1.25″)


LRGB filters optimized for high precision astrophotography and correct colours for all types of objects.

SKU: ZWO-LRGB1.25 Category:

Product Description



  • Schott substrate material
  • Thickness 1.1mm
  • Fine-optically polished to ensure accurate 1/4 wavefront
  • 90% transmission at passband
  • Infrared wavelength 700-1100nm cut-off
  • Precision off-band blocking
  • Multi-layers anti-reflection coating


here is the the transmission curve



  • 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. :

    Plase let me know the thickness of glass.

    • Sam Wen


      it’s 1.1mm thickness

  2. :

    Would I still require a uv/ir filter with these

    • Sam Wen


      no, the L filter = IR/UV_CUT filter

  3. :

    Hi Sam,

    Are these filters parfocal or some focus adjustement is needed for RGB imaging?

    Thanks in advance!

    • Sam Wen


      Yes, they are the same thickness 1.1mm and parfocal

  4. :

    Is it possible to view data on the % Transmittance and Passbands by wavelength for these filters?

    • Sam Wen


      just updated the description include more detail

  5. :

    hello , i am interested in buying this filter set but I am confussed with the curves of G and R color.. it seems to cut some wavelengths near the Na/Hg region …but not in the center of these lines..what is going on?
    What the deference of these filters and Asi1600-LRGB set?
    thank you in advance

    • Sam Wen


      this is recommend for planetary imaging
      but the new one is for DSO imaging

  6. :

    Would these 1.25 filters work well with the ASI290MM on an Edge C11?

    • Sam Wen


      of course

  7. :

    To what focal ratio are these filters parfocal to? What are the tolerances of the filter thickness?

    • Sam Wen


      the tolerances of the filter thickness is around 0.05mm
      parfocal depends on optics

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