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Our Multispectra filter blocks out most light pollution allowing you to take high contrast and natural color images of the Milky Way with an urban foreground. Perfect for creators seeking urban nighttime time-lapse.
Urban light pollution results in social inequity not only in low and mid-income neighborhoods but creates underrepresentation in the fields of astronomy and physics. As a BIPOC-owned business, we wanted to help correct the underrepresentation.
In collaboration with astronomers and astrophysicists at Taiwan's famed Academia Sinica Research University and other researchers around the world, we developed a new light filter to block urban light pollution so astro enthusiasts in the BIPOC community can capture and be inspired by a richer view of the universe.
Highlights
Features
Frequently Asked Questions
What is the difference between the 0.5mm and 1.0mm glass options?
The 0.5mm ultra-thin glass reduces the halo effect around celestial objects compared to the standard 1.0mm glass, making it ideal for astrophotographers who want cleaner star rendering. Both versions block urban light pollution effectively.
What Bortle scale is this filter designed for?
The Multispectra filter is ideal for Bortle scale 3–9, making it suitable for both suburban and urban environments with significant light pollution.
What sizes are available?
Available in 1.25", 2" (48mm) rear-threaded, 2" (48mm) front and rear threaded, and 77mm — each in 0.5mm and 1.0mm glass thickness.
Is there a clip filter version available?
Yes. Clip filter versions are available for Canon, Nikon, Sony, Fujifilm, Pentax, Olympus, Panasonic, Blackmagic Pocket Cinema Camera, and Z Cam E-2.
Is this filter covered by a warranty?
Yes. STC offers the world's first global warranty and repair service for filters, covering this filter against manufacturing defects.
Our filter is designed to block these common types of urban light pollution sources:
More importantly, the filter must allow high transmission for the visible spectrum of the target celestial bodies. These spectral lines include:
H-alpha (Hα) red spectral line, wavelength 3nm.
H-beta (Hβ) aqua spectral line, wavelength 1nm.
OIII aqua spectral lines, wavelengths 9nm and 500.7nm.
SII red spectral line, wavelength 4nm.
Yellow-orange celestial body spectral line, wavelength 605nm.
Spectrum design blocks purple light under 410nm as well as 620~640nm skylight and over 680nm near-infrared for optimal starry skies.
Enhances visible light from celestial light sources in the wavelengths H-alpha (656.3nm), H-beta (486.1nm), OIII (495.9 nm and 500.7nm), and SII (672.4nm).
We use IBAD (ion beam assisted deposition) to coat the optical film on Schott B270 glass for the best transmission and durability, plus our patented Ultra Layer double-sided hydrophobic anti-smudge nano-coating for ease of use and cleaning.
The rim is made from CNC machined aluminum alloy and can be fitted to all kinds of astrophotography instruments. The frame’s inner surface has also been treated with anti-stick Teflon with a black matte finish to reduce glare and ghost images.
We designed this filter in conjunction with Dr. Wang to address social inequity in astrophotography. This image of Orion Nebula (M42) was shot on campus at National Taiwan University by Wei-Hao Wang. The University is in the middle of downtown Taipei, one of the most light polluted cities in the world!
Our Multispectra filter is designed to capture stars and nebulae even under urban light pollution conditions. The multi-band filter blocks certain urban light pollution sources minimizing your post-production effort.
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