ZWO LRGB 31mm Filters

$169.00

Clear
SKU: ZWO-LRGB31 Category:

Product Description

The ZWO LRGB  31mm filter has better transmission, better coating,  better color separation

the RGB color combine weights will be approximately 1:1:1

  • Fine-optically polished to ensure accurate 1/4 wavefront
  • more than 92% transmission at passband
  • Infrared wavelength 700-1100nm cut-off
  • Precision off-band blocking
  • Multi-layers anti-reflection coating
  • Small spectral “gap” to minimize effect of light pollution
  • More parfocal – thickness 2 mm

Technical Parameter:

Name: ZWO 31mm LRGB filter (4 filters)

Size: D=31mm

Thickness: 2mm

here are the detailed photos

31mm-r

31mm-g

31mm-b

31mm-l

How to judge the positive and negative?

It is a little bit hard to judge the LRGB filters. Please watch the picture below carefully.

LRGB judge

Transmission Curve

RGBL ASI1600

 

Shipping

  • Fast Shipping(amount ≧ 299USD) for free
  • Fast Shipping(amount < 299USD) : $20.00
  • Free Shipping(amount < 299USD) (Air Mail, 3-4 weeks) (Free)

Introduction

  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:

DGM: http://webtrack.dhlglobalmail.com/?locale=en-US

China air mail: http://www.17track.net/en

Tax

  • 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: info@zwoptical.com. 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.

Before first usage of this product read manuals and install correct drivers and software.

Do you have uestion, answer or comment? Post here!

  1. :

    White Balancing RGB Filters ?
    Hi,
    I have a ASI 1600 MM-C and the ZWO LRGB filters (31 mm). I have read that exposure time for each filter is not the same.
    Can you tell me the wich is the ratio in exposure time between each filter ?

    Thank you.
    Jean-Marc

    • Sam Wen

      :

      usually 2:1:1:1 can provide better SNR of the image

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