For information or advice call 020 8763 9953 or email bernard@modernastronomy.com
Chroma SII 3nm Filter

Chroma SII 3nm Filter

(1 customer review)

£549.00£1,473.00

Chroma SII 3nm Narrowband Filter

SII filters isolate the emission from ionized Sulphur atoms, which are common in nebulae.

Category: Tag: Brand:

Description

Chroma SII 3nm Narrowband Filter

SII filters isolate the emission from ionized Sulfur atoms, also common in nebulae.

Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm.

  • Wavelength (CWL): 672
  • Bandwidth (FWHM): 3

1 review

  1. Jonathan Bennink

    Fantastic filters, the absolute best out there. I got hooked on narrowband with my ZWO filters that came with my ASI1600MM, but these are in a league of their own. I upgraded to the 3nm Chroma set because I want to image during any moon and under Bortle 5 class skies and the results are breathtaking. With the Ha and Sii you can image during a full moon and with Oiii it’s best to wait for 60 % or less, depending on where your target is. NO internal reflections and nicely packaged with a good report and an extremely high transmission. If you spend 1500 pound on a scope + 1500 on a mount + 1500 on a camera, why use cheap filters?

Add a review

*

This site uses Akismet to reduce spam. Learn how your comment data is processed.

UK Delivery Prices include postage to all mainland UK addresses, except where indicated. Larger items may attract a surcharge for off shore or remote locations. When your item is dispatched, you will receive an email from our shopping cart saying ‘Your order is complete’ We use Royal Mail and Courier services, whichever is more appropriate for the weight and value of your order. International Delivery: Website prices DO NOT include International delivery costs unless specified. We are happy to ship to most countries. We use a variety of Royal Mail and Courier services, depending on the weight, size, value and urgency of your order. Place your order via the shopping cart and you will be advised by email of additional shipping charges prior to the processing and dispatch of your order. Or simply email us for details of shipping charges to your country before you place your order. Some items which are particularly popular with overseas purchasers already display, in the purchase menu, combined purchase and shipping costs to various regions adjusted for UK VAT (sales tax) where necessary. If you reside outside the European Union, please check with your customs authorities for details of any import taxes, duties and other charges that may be imposed on entry to your country. We have no control over these.