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Cyclops Optics

STC Astro Duo-Narrowband Clip Filter (Sony APS-C) + FREE Shipping + FREE LensPen

HK$2,950.00 HK$2,250.00
(You save HK$700.00)


STC Astro Duo-Narrowband Clip Filter (Sony APS-C) + FREE Shipping + FREE LensPen

HK$2,950.00 HK$2,250.00
(You save HK$700.00)
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 Duo-Narrowband enables astrophotographers to capture two narrowband emission lines simultaneously, rendering ultra high contrast nebula images even if under the influence of strong light pollution in city. This ultimate dual narrowband filter enables one-shot-colour cooled camera and DSLR users to capture narrowband signals efficiently. 



  • STC Duo Narrowband Clip filter for Sony APS-C camera (see compatible list below)
  • STC high quality microfiber cleaning cloth


  • Passes two major narrowband 10nm transmission lines — Ha (656.3nm) & O-III (500.7nm) at high transmission rate (~80% or above)
  • Suitable for DSLR / mirrorless camera and One-Shot-Colour Camera
  • Superb contrast for nebulosity 
  • Available in 48mm standard size and Clip Mount version (see bottom of page)

Compatible Sony APS-C bodies

  • A5000
  • A5100
  • A6000
  • A6100
  • A6300
  • A6400
  • A6500
  • A6600
  • ILCE-QX1

Compatible Sony lenses

  • E PZ 16-50 MM F3.5 - 5.6 OSS
  • E 18-200 mm F3.5-6.3 OSS LE
  • FE 24-240 mm F3.5-6.3 OSS
  • FE 12-24mm F4 G
  • FE PZ 28-135 mm F4 G OSS
  • FE 70-200 mm F4 G OSS
  • FE 70-300mm F4.5-5.6 G OSS
  • G Master FE 24-70mm F2.8GM
  • G Master FF 70-200 MM F2.8 GM OSS
  • FE 28 mm F2
  • FE 50mm F1.8
  • FE 50 mm F2.8 Macro
  • FE 85mm F1.8
  • FE 90mm F2.8 G Macro OSS
  • G Master FE 85mm F1.4 GM
  • G Master FE 100mm F2.8 STF GM OSS

STC Astro Duo-Narrowband Transmission Characteristics


* This diagram is for illustration purpose only

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 aways clean. If necessary, it's effortless to clean.


12 months warranty covering defects due to manufacturing and workmanship


Substrate 1mm Schott B270 glass
Wavelength Hydrogen-alpha (656.3nm) & Oxygen-III (500.7nm)
Water droplet contact angle >110º
Environmental Rating RoHs 2.0
Made in Taiwan  

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