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Cyclops Optics

STC Astro-Multispectra Filter 1.25" + FREE Shipping + FREE LensPen



STC Astro-Multispectra Filter 1.25" + FREE Shipping + FREE LensPen

Shipping Weight:
0.20 KGS
In stock now! Typically ships in 24 hours
Calculated at checkout

Product Description

Exclusive offer from Cyclops Optics: Besides the usual FREE Shipping Offer for most countries worldwide, now we further offer a FREE LensPen (original value US$11), allowing you to clean the surface of your optical equipment safely. In case your chosen option is out of stock, we will send another version for you.

STC Astro-Multispectra enables photographers to image deep sky objects under the influence of light pollution in city. The natural colour tone and hue are very well preserved while cutting out unwanted emission from artificial lights. Specially designed for one shot colour camera and DSLR. 

The 1.25" version is usually used by deep sky imaging astrophotographers under light polluted skies as luminance channel.


  • STC Astro-Multispectra 1.25" filter
  • STC microfiber cleaning cloth
  • UV index card


  • Blocks out light pollution to enable astrophotography in city
  • Suitable for DSLR and dedicated CCD camera
  • Natural colour representation
  • High transmission for astronomical bodies emission
  • Co-developed by STC and Dr. Wei-Hao Wang, a renowned astrophotographer and professional astronomer

For use with camera lenses, please check out:

Before & After

ngc7000-unfiltered-2048px.jpg ngc7000-stc-astro-m-2048px.jpg
Without STC Astro-Multispectra With STC Astro-Multispectra

Direct JPEGs output from Nikon D800

Credits: Dr. Wei-Hao Wang  


STC Astro-M Transmission Characteristics


  1. Natural colour representation by selectively blocking out UV light below 410nm, sky glow in between 620nm and 640nm and infrared light beyond 680nm
  2. High transmission for astronomical bodies emission at Hα=656.3 nm, Hβ=486.1 nm, OIII=495.9 & 500.7 nm, SII=672.4 nm and slightly passing yellow-orangish emission at 605nm.


STC Technologies



STC utilises ion beam assisted deposition (IBAD) to solidly bind the coatings onto Schott B270 glass, the very same glass used in Zeiss lenses. Such technique enhances the light transmission and also durability of the 160 layers of coating deposited to produce the advanced filter characteristics shown above.

With patented Ultra Layer® technology, both surfaces of Astro-Multispectra are coated with Anti-Smudge nano-coating to prevent dust and water from settling on the filter surface. Dew will not form and your filter is always clean. If necessary, it's effortless to clean.


12 months warranty covering defects due to manufacturing and workmanship

Extended to 18 months by registering on STC website.


Substrate 2mm Schott B270 glass
Weight 12g (48mm), 29g (77mm)
Wavelength 400 – 700 nm
Water droplet contact angle 110º
Layers of coatings Total of 160 layers on both surfaces
Environmental Rating RoHs 2.0
Made in Taiwan