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William Optics STC Ultra Layer® Astro Multispectra Fiter 48mm - YF-STC-M48

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  • The SLR lenses focal distance is recommended for 60mm or more.
  • It is specially designed Astro-Adapter M48-M56 P0.75mm for telescope adapter connecting Astro filter. CNC Machining is used in precisely manufacturing metal parts. Anodizing Aluminium process could reduce the reflection of the image.
  • STC Astro-Multispectra filter can reduce the interference from artificial lighting in the city, and enhance the wavelength of Hα, Hβ,OIII and SII.
  • It is coated by the use of the IBAD (Ion-beam-assisted deposition) technology on Schott® B270 optical 2mm glass, working for higher durability and easy cleaning, and preventing aging variation in optical spectral characteristics due to temperature and humidity change.
  • High-quality double-sided NANO Anti-smudge coating builds excellent performance on waterproof and grease-proof.
  • Matte black anodized and Teflon-coated frame design eliminates flare and easy to install or remove from your lens.
  • This product is an interference filter. Its spectrum characteristics will be subject to the incidence of incoming light. Directly shooting at a strong light would affect the image performance due to the light interference and reflection.

Product Details

STC Astro Multispectra filter is a general-purpose light pollution suppression filter designed to use with DSLRs cameras. It will effectively reduce the interference from artificial lighting such as mercury and sodium street light, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects. Supporting by Dr. Wei-Hao Wang, it is improved to passing more than 95% of the light from the main spectral lines from emission nebula, such as the predominant Hydrogen-Alpha line at 656.3nm, the Oxygen III line at 495.9 & 500.7nm, and the Hydrogen-Beta line at 486.1nm. It is coated by the use of the IBAD (Ion beam-assisted deposition) technology on Schott® B270 optical glass, working for higher durability and easily cleaning. Since light pollution and airglow are filtered out with the Astro filter, much more of the interesting wavelengths of the deep-sky object will be recorded in these longer exposures.




(L) With Filter / (R) Without Filter

The SLR lenses focal distance is recommended for 60mm or more, or it may cause COLOR SHIFT. (Photo by 陳不賴)



Available Size 48mm Clip Filter
Material SCHOTT® B270 Optical Glass, Aluminum 6061 rim
Thickness 2mm Glass, 3.5mm Rim
Water drop contact angle > 110°
Origin Taiwan
Passed RoHS 2.0


Example Photo

  • Astro Example Photo
  • Astro Example Photo
  • Astro Example Photo
  • Astro Example Photo

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

Client-Initiated Cancellations

Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.

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