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Astronomik SII 6 nm CCD EOS Clip Filter - SII6-EOS

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SKU: ASF-SII6-EOS

Astronomik SII 6 nm EOS Clip Filter


  • The Astronomik SII 6 nm EOS Clip Filter is a photographic filter in an EOS Clip frame format.
  • Designed with the maximum technical standards in mind for the highest optical performance for you desire for deep sky imaging with your Canon EOS camera.
  • Permits ionized sulfur (SII) light to pass while blocking close to the entire remainder of the visual spectrum as well as IR.
  • This SII EOS Clip Filter from Astronomik has an approximately 6 nm FWHM.
  • Perfect for imaging planetary nebulae and remnants of supernovae as it obstructs all undesired light pollution.
  • German-made for supreme quality optics!


More About the Astronomik SII 6 nm EOS Clip Filter


The Astronomik SII 6 nm Canon EOS Clip Filter is an extremely narrow emission-line filter designed for use with Canon EOS DSLR Cameras along with devices as fast as f/3.5 for CCD astro-imaging applications only. Not appropriate for visual or solar operations. This narrowband filter lets ionized sulfur (SII) light from emission nebulae to pass through to your sensor while, simultaneously, totally cutting off the rest of the spectrum.

With its smaller 6 nm FWHM, this Astronomik SII CCD EOS Clip Filter is ideal for exhibiting the maximum amount of contrast between objects that emit SII light, such as emission nebulae and the skyglow background. 6 nm filters offer similar performance when compared with 12 nm filters, but also provide a higher contrast gain. On the contrary, using a 6 nm FWHM filter can cause background stars to appear dimmer, or to not be viewable at all. Thus, to achieve maximum contrast without sacrificing the background quality of your final image, it is best to employ both the 6 nm and 12 nm SII filters together.

Since the Astronomik 6 nm SII EOS Clip Filter completely eradicates mercury (Hg) and sodium (Na) emissions lines, the main culprits of light pollution, it makes an excellent filter for imaging in heavily light-polluted environments.

The Astronomik EOS Clip Filter, like all filters from Astronomik, is parfocal with all other Astronomik filters. Additionally, this filter is highly resistant to the effects of scratching, aging, and high humidity. Package includes a durable, supreme quality plastic storage container.

Astronomik Clip-Filter System


This Clip-Filter system, exclusive to Astronomik, is constructed from black anodized aluminum and laser-cut on extremely modern machines. In a matter of mere seconds, this filter can be inserted directly into the Canon EOS camera body. No adjustments are necessary and all lens operations such as focus, screen, and image stabilization, remain operational! All Canon system lenses with the exception of the EF-S series, plus all M42 and T2 lens adapters, work with the Astronomik EOS Clip Filter. This system also doubles as a dust protector, keeping dust from gathering on your sensor during long exposures.

Transmission Specifications


  • Usual ionized sulfur (SII) line transmission of 96%
  • Provides total obstruction of unwanted light from UV up to IR


List of Compatible Canon EOS Cameras

Canon EOS
 Suitable for Clip-Filter? 
 LiveView? 
7D MkII
Yes
Yes
7D
Yes
Yes
20D
Yes
No
20Da
Yes
Yes
30D
Yes
No
40D
Yes
Yes
50D
Yes
Yes
60D + 60Da
Yes
Yes
70D
Yes
Yes
77D
Yes
Yes
80D
Yes
Yes
300D / Digital Rebel / Kiss Digital
Yes
No
 350D / Digital Rebel XT / Kiss Digital N 
Yes
No
 400D / Digital Rebel XTi / Kiss Digital X 
Yes
No
450D / Rebel XSi / Kiss X2
Yes
Yes
500D / Rebel T1i / Kiss X3
Yes
Yes
550D / Rebel T2i / Kiss X4
Yes
Yes
600D / Rebel T3i / Kiss X5
Yes
Yes
650D / Rebel T4i / Kiss X6
Yes
Yes
700D / Rebel T5i / Kiss X7
Yes
Yes
750D / Rebel T6i / Kiss X8
Yes
Yes
760D / Rebel T7i / Kiss X9
Yes
Yes
1000D / Rebel XS / Kiss F
Yes
Yes
1100D / Rebel T3 / Kiss X50
Yes
Yes
1200D
Yes
Yes
1300D
Yes
Yes
2000D
Yes
Yes
100D
Yes
Yes
200D
Yes
Yes