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. 

Includes

• STC Duo Narrowband Clip filter for Panasonic M4/3 mirrorless camera (see compatible list below)
• STC high quality microfiber cleaning cloth

Highlights

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

Features

• Clip Filter is designed for Panasonic & Blackmagic cameras. Mounting and removing the Clip-Filter is quick and easy. The colour shift problem that may occur due to the wide angle SLR lens in peripheral areas of the image could be reduced. The recommended lenses focal length is 14mm or longer
• The material is A2 stainless steel which is virtually non-magnetic and less brittle at low temperatures. Specially designed Clip-shaped structure could be pressed firmly while attaching the lens on camera body.
• STC Astro-MS Clip filter can reduce the interference from artificial lighting in the city, and enhance the wavelength of Hα, Hβ, OIII and SII. (Hα=656.3 nm, Hβ=486.1 nm, OIII=495.9 & 500.7 nm, SII=672.4 nm)
• 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 easily cleaning, and preventing aging variation in optical spectral characteristics due to temperature and humidity change
• High-quality double-sided NANO Anti-smudge coating provides excellent performance on waterproof and grease-proof capability
• Considering the different optical lens properties of all kinds of brands, it is normal for spherical and coma aberration to occur on part of the fisheye lens, super wide angle lens and wide angle lens.
• 12 months' original manufacturer warranty and lifetime warranty on aluminium frame 

Compatible Camera

• All Panasonic M43 cameras
• Blackmagic Pocket Cinema Camera 4K
• Z Cam E-2

Also available for

• Canon APS-C
• Canon Full Frame
• Fujifilm X APS-C
• Nikon APS-C
• Nikon Full Frame
• Olympus M43
• Pentax
• Sony Full Frame
• Sony APS-C
• 48mm / 77mm

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

Warranty

6 months' warranty covering defects due to manufacturing and workmanship

Extended to 12 months by registering on STC website.

Specifications